About this revision video, I would like to note that when using a calculator you won't get both 2 marks if you don't show you're steps on the paper. Most teachers don't tell us this and I only found out recently.
please bring back A level math tutor 😭😭😭😭 EDIT: the fact that this comment has nearly the same number of likes as the pinned comment just proves my point. plz revive a level maths tutor
7:15 there's actually a button specifically designed for these types of questions: the x10^ button. it's at the bottom, middle column. you can press it once and it immediately brings 'x10^' without having to press four different buttons in succession.
@@takoizu nah i mean theres no need to get defensive it was a serious question ;-; and i didnt necessarily say there was anything particularly wrong with furries either, if you wanna be a furry u do u ig as long as ur not doing anything illegal ygm
Ive never gotten less than a grade 9 in maths before, but i went through this video just incase i forgot anything. im feeling pretty prepped now, thanks a ton
From a to b change in y = +4 change in x = +2, what you are you are saying is a to b is plus 4 but then a to b is -2 which it isn’t, you’re going one end to the other by mistake
for the question 1:20:14 --- I got x = 29 and y = 69.75 as all the angles add up to 360 so 2x + 4y = 337 and opposite angles add up to 180 so 5x-20+2x-43 = 180 so x = 29. 58+4y = 337 so y = 69.75
You can do that, it works both ways as he kept both the mass and volume respective to litres it won’t affect the answer, it looks like it should but it won’t
@@TheGCSEMathsTutor yes I can attest on behalf of him you really helped me modify my maths skills too went from a grade 4 to a grade 7 / 8 . within 4-5 months of commitment thanks and I have subscribed to you
Hey! If you use the search feature on my home page I have made everything, here is bounds: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-k8vPdaYARIY.htmlsi=-qdcGTjXakXo2i4t and here are some harder bounds with compound measures: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-nIKr2M1yGpQ.htmlsi=qZvpUA90Uau3nmwc 😃
Rule is to never use elimination with a quadratic, the square numbers WILL mess you up so substituting is the safest bet, and because there are two values for y and two for x you need to solve a quadratic
2:54:05 I believe the radius =4 because we do linear scale factor 15/10 to get 1.5 and we use the radius of the big cone which was 6 and divide it by the linear scale factor which is 1.5 which gives us the radius of the smaller cone which is 4? am I amiss?
Hello i got -0.2 as one of my y values bc i started by finding x in terms of y by adding 4y^2 to 9 then rooting it to find x then subbing 3 + 2y into the x for the bottom equation, where i got 9 + 6y + 4y = 7, so y = -0.2 (this is for question 17, i didnt do any further than the first y value bc i got a different answer to u)
I did the same in the beginning too, turns out that you cant root until there is no addition or subtraction left. In this case there was so it wouldn't work. Like 3^2+4^2=5^2, but if you rooted them, it wouldn't add up. Makes sense?
You can only root something when it equals 1 or 0 as rooting isn’t rational and it changed based on the number unlike multiplication which is cumulative, like Pythagoras the root of 9^2 + 8^2 does not equal 9 + 8
No each bracket represent either A or B, the whole bracket, as you can see they are squared and you can use difference of two squares, as I said earlier A = (x^2+4) and B = x^2-2). The difference of two squares is (A+B) x (A-B) so wherever it says A you write (x^2+4) and B for (x^2-2)
I have a question For the trig what number of decimal places should we round it to after punching it into the calculator. Seems I’m on the right path but always end up with different numbers after the decimal point 1:49:47
When using the calculator it is best to use the 'ans' button which holds the value of the most recent answer so you use all the decimal places when working out (whilst saving time by not having to put every individual decimal value into the calculation manually) and then once you reach the final answer you can round to the nearest decimal place. Always right down every single value you use in your caluclator on the paper exactly as it would be inputted into your calculator (without rounding) and only round once at the end of the working out for the final answer. This will maximise any method marks or 'error carried forward' marks for a wrong answer or incorrectly rounded answer (if you did accidentally round to soon) and mean you are more likely to get the right answer rounded correctly to the specified decimal place or significant figures. Having all the values written down with all the decimals as outputted on the calculator will also save a lot of time checking work at the end because it saves having to redo the entre question to check and increases the chance of you spotting an error. Don't round until the end for any question that specifies the answer must be rounded. The difference between rounding at the very end of a question or rounding all the values from the beginning could mean your answer is very inaccurate despite using the correct method; if you do not show the method clearly with all the values used and round early you will lose a lot of marks despite knowing the maths required. It would be annoying for you to lose the marks by rounding early despite understanding the maths concepts required for the question.
Following from this guys massive answer if you need to show working and downt want to write it all out do it to max 3 decimal place but use the ANS button still
@@Pabloise yeah that's fair enough to save time and space on the page. i'd also add that if the answer doesn't specifiy rounding it would be fine to round to 2 or three d.p to save space although I'd always still keep the calculator value written on the page in the working out space. The answer was massive but only to fully explaain and re-iterate what I was saying because I think it's important in order to fully understand. It looks longer than I remember haha I think it was just after my English language Q5 revision
are these the only topics that may come up on the paper 2 exam? or could other topics come up too? (thanks for the video by the way its really helpful)
@TheGCSEMathsTutor For Q7(c) Do you have to factorise the 12 out at the end or could you just leave the answer as it is. Also for the same question could you divide the end answer through by 12 as it says simplify fully to get x squared + 1? Thanks 🥺
You would most likely get all marks for leaving 12x^2 + 12, safer to factorise, and you cannot divide by twelve as this would change the value of the equations, if x was equal to 3 and you divided the end result by twelve it wouldn’t be the same as if you left it
Yes, 1 significant figure is still an error interval as it’s rounded, 1 significant figure is decided at the first actual number, so 1 that isn’t e.g 0023 to 1 sf is 20 it’s like a decimal place but the decimal is nowhere or imagine it at the start
30:55 Here if you get 8(-n-1) do you still get the mark? because during my working out I done 4n^2+4n+1 - (4n^2 +12n+9 ) therefore got minus numbers. please reply quick.
probably not because it wants the difference between them and that would not be the difference. Just make it easier and subtract the smaller one from the bigger everytime.
@@Antony-v9i you can do it both ways it doesn’t matter that’s just way easier, and you said don’t solve it with the other question, which doesn’t make sense just say don’t use the difference of two squares
Yeah I don’t know what the other guy is on about, but you never brought the terms together, if a is in both sides your main goal is to get them together, and in these questions it’s pretty much without a doubt always factorising them
This is the practice booklet, the practice paper I haven’t made/released yet 😃🙏🏼 keep an eye out for the video, as soon as I post it the paper goes live on the website!
The higher only is around 3 hours long, it’s an extensive videos covering everything that hasn’t appeared yet, except a few calculator topics I’d like to do a small separate video on soon! 😃🙌🏼
The topics can be assessed again but the probability of duplicate topics across the exams is very low, as an example, since 2017 there hasn’t been a year where transformations were assessed on more than one paper for the summer exams, but aspects like using ratios or using equations appears across multiple exams, this just provides a key focus for the “unseen” topics 😃
