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The Maths Prof: Changing Subject of Formula EXAM QUESTIONS 

The Maths Prof
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This video contains a variety of exam questions on changing the subject of a formula (includes fractions, squaring, square rooting etc.). If you like, grab a pen, some paper and your calculator to have a go at some yourself! You can forward to the end of each example to check if your answer is correct... :-)
Answer to question 1 at 3:07
Answer to question 2 at 6:15
Answer to question 3 at 7:57
Answer to question 4 at 10:00
Answer to question 5 at 12:39
I hope you find the lesson useful! Subscribe to my RU-vid channel to stay up to date with new uploads and follow me on Instagram @themathsprof for more maths! :-)

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27 июн 2017

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Комментарии : 123   
@eugenewilliams8440
@eugenewilliams8440 2 года назад
I'm 62 years old. This is the first time someone has made math this clear !🙂👌
@Sindhabadforever
@Sindhabadforever 3 месяца назад
❤❤❤
@thatboyany3512
@thatboyany3512 Год назад
Maths Prof . I owe you 1 million dollars. I now understand the math than in class. Thanks a lot
@mondesitahani7505
@mondesitahani7505 Год назад
Thanks a lot Maths Prof it really makes math so easy and understandable
@adaugouzo3329
@adaugouzo3329 9 месяцев назад
😂😅
@agentxsz
@agentxsz 2 года назад
am i the only one who doesnt know how to thank her if she replied really i appreciate your work your the best your better than all teachers on earth !
@NotMarkKnopfler
@NotMarkKnopfler 2 года назад
I'm 51 and now learning the maths that I was incapable of learning when I was at school! 👍
@nehasingh-px2gw
@nehasingh-px2gw 3 года назад
It deserves 2 million views or more than that ❤️
@georgianmobster6761
@georgianmobster6761 7 лет назад
Thankful. This really helps me out
@jacquesdisles9833
@jacquesdisles9833 2 года назад
You're a great teacher. That would be tested in the final exam for twelfth grade. I will watch that video for more. Thank you for your wonderful tutorials and have a blessed day and stay safe. 😁😁😁🙌
@the_.godfather_.1.0
@the_.godfather_.1.0 3 года назад
👏👏 thank you very much prof this really helps me all the way in southern Africa , Namibia
@TheMathsProf
@TheMathsProf 3 года назад
So happy to hear that! 👍😁
@musadem2554
@musadem2554 3 года назад
Thank you I don't understand it before but now is clear to me keep it up
@zoey3605
@zoey3605 2 года назад
i just found your channel and your videos are so helpful! thank you x1000000
@iangilbert4811
@iangilbert4811 3 года назад
You are a brilliant teacher. And you have a lovely smile :)
@IcallDib
@IcallDib 2 года назад
true
@tomsammons6480
@tomsammons6480 Год назад
Shooting your shot Ian
@iangilbert4811
@iangilbert4811 Год назад
@@tomsammons6480 worth a try.
@mnekidwell7048
@mnekidwell7048 10 месяцев назад
Wow. It's never been this easy. Thank you so much
@silky6610
@silky6610 3 года назад
Thank you. This helped me out
@14bhirh_01
@14bhirh_01 Год назад
THANK YOU!! It's very helpful
@patrickjoseph6929
@patrickjoseph6929 Год назад
This lady is an excellent teacher
@kamabokogonpachiro6797
@kamabokogonpachiro6797 3 года назад
You are le best teacher.
@srikanthsrini6873
@srikanthsrini6873 2 года назад
Really thanks I can understand very well
@rub8995
@rub8995 5 лет назад
Very very helpful , I have a math test and this was gold
@alialsuod9079
@alialsuod9079 3 года назад
Thanks Mam Did pass exams beautifully bcz of you Thanks
@TheMathsProf
@TheMathsProf 3 года назад
Well done! 😄👏
@evexify_-5308
@evexify_-5308 3 года назад
Thank you so much
@kudakwashemitchell6882
@kudakwashemitchell6882 3 года назад
Woooooow you are a good teacher ....keep it up
@jamitjohnz252
@jamitjohnz252 2 года назад
Thank you so much for helping me
@dorisnyangu3014
@dorisnyangu3014 6 месяцев назад
Thank you am following 😊
@onsku6100
@onsku6100 4 года назад
Lovely!! It*s easy to watch this very clear teaching =) Br. Onni from Finland
@hanankamis4758
@hanankamis4758 2 года назад
Thank you 🌹
@hassansingano1150
@hassansingano1150 5 лет назад
Thanks
@thevandesilva3436
@thevandesilva3436 4 года назад
Your teaching is soooooooooo helpful...I really love your teaching !
@TheMathsProf
@TheMathsProf 4 года назад
I'm so happy it helped! 🙌
@ha7classic127
@ha7classic127 3 года назад
@@TheMathsProf why have you stopped you"re such a wonderful teacher
@mayashura4829
@mayashura4829 3 года назад
You’re amazing
@MarciaArleneDebra
@MarciaArleneDebra 5 лет назад
The ample variety of questions adequately illustrates the use of changing the subject of the formula with different operations, and provides cognitive flexibility in the use of the technique.
@furgansiyahov7296
@furgansiyahov7296 4 года назад
Which grade is this for
@otienoedgardavis4550
@otienoedgardavis4550 2 года назад
Applause to the teacher 👏👏👏✔️💯💯
@heriakleguzaye7935
@heriakleguzaye7935 4 года назад
ma favourite teacher
@solomonappiagyei7322
@solomonappiagyei7322 4 года назад
you are the bestttttttt
@vinesta
@vinesta 5 лет назад
Thank you for the help !!!!
@babe2016
@babe2016 2 года назад
your lessons are really easy to understand
@TheMathsProf
@TheMathsProf 2 года назад
So pleased you think so ☺️👍
@trishsamson4184
@trishsamson4184 5 лет назад
Woooooow this is sooo greeeeat😄🤩
@oxygeninhaled885
@oxygeninhaled885 5 лет назад
The best youtube teacher 👐👐👐👐👐👐
@hasanyousaf6746
@hasanyousaf6746 5 лет назад
Have you heard of freesciencelessons?
@habibaelhadad1000
@habibaelhadad1000 3 года назад
Thank u
@stalli4life
@stalli4life 4 года назад
Thank you for the help👏🏻
@clems6989
@clems6989 5 лет назад
You truly are wonderful......
@Mocha_Moon_011
@Mocha_Moon_011 3 года назад
Thank you🤗
@TheMathsProf
@TheMathsProf 3 года назад
You’re welcome 😊
@furthermoore1863
@furthermoore1863 4 года назад
the best
@bradleythomas214
@bradleythomas214 4 года назад
Thank you.
@TheMathsProf
@TheMathsProf 4 года назад
You're welcome! 😊
@tramhicks1215
@tramhicks1215 4 года назад
I understand some.
@abdullahisane
@abdullahisane 5 месяцев назад
Thank you teacher . this helped me a lot 😢❤❤
@TheMathsProf
@TheMathsProf 4 месяца назад
I'm so glad!:)
@myslenienieboli9512
@myslenienieboli9512 5 лет назад
Thank you very much!
@daeshafindley796
@daeshafindley796 5 лет назад
for that last question i change it up a little and got the same anwser
@ZachDrake5960
@ZachDrake5960 Год назад
I did notice a pro and a con with your first example. PRO : With this example you showed that quadratic equations, where y is a quadratic function of x, can be rearranged. The key is to start with converting the quadratic from standard form to vertex form. In standard form, quadratics have x terms with different powers, making it impossible to isolate x. In vertex form, it is written with one x value going through an addition/subtraction, then squared, and multiplied by a number, and then adding/subtracting a number. The fact that there is one x value listed in vertex form means there is no conflict of powers of x like in standard form, now making it possible to isolate x. CON : The one gripe I had is the fact that when you got rid of the square by square rooting, you forgot to mention that it can be a positive root and/or a negative root, since squaring any real number, positive or negative, always gives a positive. So, the answer is 4 + or - that square root, with 4 out in front so as to show it is not inside the root. The same goes for the pythagorean theorem example. I figured this out when I tried graphing similar examples.
@yasminelsawefy
@yasminelsawefy 4 года назад
Amazing especially for the British cirrculum
@urlocalyoutuber6700
@urlocalyoutuber6700 3 года назад
This topic was my nightmare, but you made it seem so easy. Thank you so much
@solomonappiagyei7322
@solomonappiagyei7322 4 года назад
i finally understand love you so muuch and keep up the good teaching
@KarimatouJallow-km6yg
@KarimatouJallow-km6yg 7 месяцев назад
I like how u teach it makes😃 me understand more 🥰
@KarimatouJallow-km6yg
@KarimatouJallow-km6yg 7 месяцев назад
But I want subject of the formula where u have pie r square
@abdulazizalghfily7420
@abdulazizalghfily7420 4 года назад
Thank you, your better than my math teacher
@shekhar7747
@shekhar7747 5 лет назад
Lots of Thank u🙏
@joseph_donovan
@joseph_donovan 4 года назад
Indubitably! Love it. Thank you.
@rizzoli7
@rizzoli7 4 года назад
lmao stfu
@tomandjerry2069
@tomandjerry2069 6 лет назад
The third formula to make b the subject i did differently i just presumed that root a sqaured plus b squared would equal a+b. My answer was just the exact square root of yours c-a=b
@parijat8166
@parijat8166 5 лет назад
that's not how it works. You can't make the square root of a2+b2 = a+b. The square root is for the EQUATION'S ANSWER, not the variables itself. It's a rule in algebra. Therefore your answer is wrong and is not the same as hers.
@cardiminaj9240
@cardiminaj9240 5 лет назад
You so much help 😊🖒🖒🖒🖒
@asmaasaadsaad3290
@asmaasaadsaad3290 4 года назад
Make y the subject of 8-2y+5x=0 Do we add or subtract the eight to cancel it out
@user-le3fs1us8l
@user-le3fs1us8l 5 месяцев назад
Hi MathProf how would you make t the subject of the formula in the S=ut+at^2 expression
@BlessGodMinistry
@BlessGodMinistry 3 года назад
Appreciate the help thanks so much God bless you
@jameswilson5980
@jameswilson5980 Год назад
So much easy than the Nigerian way of solving subject of formula
@lizsa3145
@lizsa3145 3 года назад
Wow! ok so home educating my daughter for IGCSE's...she asks me all the time..'why on earth do they need to learn these formula's?!'....I ask that myself, unbelievably difficult!..
@muhdaabaa
@muhdaabaa 2 года назад
Opposites sign of: • + » - • - »+ • × » ÷ • square » square root
@hz6612
@hz6612 4 года назад
5:40 please can anyone explain me why she divided by t² instead of dividing by square root of t since the square root is the inverse of power ????
@tennehmoina2827
@tennehmoina2827 Год назад
That is the formula for displacement or distance
@raphaelowen478
@raphaelowen478 4 года назад
Thanks....You have helped me out....
@user-nd2qj9ey7i
@user-nd2qj9ey7i 3 года назад
"have fun" yeah righ
@sa_gaming_pro6517
@sa_gaming_pro6517 2 года назад
A=p(1+i) raises to 6
@SyoopGames
@SyoopGames 2 года назад
Hello Teacher, i got a question. (4:46) Now can i not get rid of the 1/2? Or I need to?
@PIKACHU-hf7sc
@PIKACHU-hf7sc 3 года назад
I wish you are my teacher
@ANONYMOUSUSER54
@ANONYMOUSUSER54 3 года назад
She is bomb thankful for your videos
@cholo7198
@cholo7198 Год назад
dont u cancel out the sqrt and square of c - a?
@shahidarazak3402
@shahidarazak3402 5 лет назад
Thanks a lot, I am going to teach how to change the formula of the subject and I just learn how.
@IslamicNationChannel__Somali
@IslamicNationChannel__Somali 5 лет назад
What I felt this as topic of form 1
@onsku6100
@onsku6100 4 года назад
These videos are very helpful when you changing subject of Formula, but do you coming any physics or do you know any good sites with learnig these Formula EXAM QUESTIONS ? THAANKS =)
@AnthonySusanna
@AnthonySusanna 3 месяца назад
😊
@joliehany7942
@joliehany7942 2 года назад
Could you please help me with this d=a(2+3b) and make a the subject of formula
@fazzynone1
@fazzynone1 3 года назад
This is extended, these are a bit difficult compared to what I studied and to what I'm preparing for, which is core.
@mosesutoni466
@mosesutoni466 Год назад
@kabirmishra8432
@kabirmishra8432 3 года назад
I have a question. At 7:05 you say that to cancel out the a^2 we need to do subtract a^2 from a^2, but then when you cancel out the b^2 you square root. How am I meant to know when to subtract and when to square root. Someone in the comments please help
@toluwanimiosuntoyinbo9336
@toluwanimiosuntoyinbo9336 3 года назад
She did not subtract b² cos 'b' was the subject so you can't cancel it out. If 'a' was the subject, you use the square root instead of subtracting
@klau3502
@klau3502 3 года назад
One question ....I'm from Albania so (sorry if i make any problem while writing).. I wanted to ask u when do we use the formula (a+b)2= a2+2ab+b2 (2 is Squared ) thank u in advance...waiting for your reply
@TheMathsProf
@TheMathsProf 3 года назад
Expanding brackets (a+b)² = (a+b)(a+b) = a²+2ab+b² 😊
@mubassilhafeez6890
@mubassilhafeez6890 3 года назад
tomorrow is my exam, Thanks!
@Art2020
@Art2020 Год назад
I would also like to you teach me computer pseudo code topic
@nabihaasif8227
@nabihaasif8227 3 года назад
It was very helpful. Can you make a video under the topic USING THE BALANCING METHOD
@KarimatouJallow-km6yg
@KarimatouJallow-km6yg 7 месяцев назад
I want subject of the formula where u have pie r square
@TiberiusStorm
@TiberiusStorm 5 лет назад
For the second question, why wouldn't you divide "ut" since they are multiplied? Instead you subtracted them.
@Astronomynatureandmusic
@Astronomynatureandmusic 4 года назад
Like you say, UT is U multiplied by T. In algebra you can see that as one "unit" called UT. You are able to add or subtract by such a unit.
@tomandjerry2069
@tomandjerry2069 6 лет назад
Ur letter a's look like a 2 and thats cool
@horriblehater
@horriblehater 3 года назад
no its not
@ayenstevens
@ayenstevens 2 года назад
What if they say make X the subject of the formula (x+n)²=x²+5
@user-le3fs1us8l
@user-le3fs1us8l 5 месяцев назад
Yeah
@georgesadler7830
@georgesadler7830 Год назад
Miss Math Prof, in problem one, you are missing a plus and minus sign in front of the square root of y-6 and also a plus and minus sign in front of the square root of C -A^2. Please correct these errors in the video.
@nutty239
@nutty239 3 года назад
Of course. I know
@judithanaman-torgbor3373
@judithanaman-torgbor3373 2 года назад
Whoever you are Jesus loves you ❤️❤️❤️
@mehermanzur4847
@mehermanzur4847 3 года назад
You are beautiful
@frimponganokye9025
@frimponganokye9025 4 года назад
You are too much
@abnwtfwc07
@abnwtfwc07 5 лет назад
Marry me.
@alanshaji1547
@alanshaji1547 4 года назад
I love you
@antonior1908
@antonior1908 3 года назад
I like your teaching ,but your British accent is about taking away my interest of your lecture. I am most comfortable with the Canadian accent ,thanks anyway
@14bhirh_01
@14bhirh_01 Год назад
THANK YOU!! It's very helpful
@paulmorrey733
@paulmorrey733 3 года назад
Thanks