09 - The Quadratic Formula Explained, Part 1 (Practice Problems & Solutions) 

Nobody else on RU-vid teaches the way you do. When I'm failing to undsomething I just come to your channel and you always make me understand

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Now I'm glad that I learned completing the square before learning the quadratic formula! You made it so clear how they are derived. Thank you, great punch line

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Wow!!, Sir, your intelligence & technic of taught is no doubt claimant of praise. Really, really, really it's adorable. Many, many thanks, Professor.

One thing I would like to mention is that 15:33 if a is negative, and you take the square root of 4a^2 you can get -2a. But since there is a plus or minus sign in the front, it does not change the form.

What a great tutor you are, you make that real understandable. Thanks, greetings from Cali, Colombia.

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A blow by blow account of the derivation...much better clear as daylight

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I always enjoy this style

12:12 is reassuring. That even the best of the best would be losing sight of the tail end of this thing they are unravelling if they look aside even for a brief moment

Wow learning it today hours before my exam thanks a lot 🤗really helped

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You are best. You really explain the work very well. Thanks for making me understand how the quadratic formula is derived.

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Nice and detailed, Simple!

Completing the square allows you to find the turning point of the quadratic.

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Best explanation ever

Brilliant!

This is very helpful

perfect thank you

Talented teacher. Thanks

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U've made it easier just like A,B,C,D 👏 👏

Great vid!

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This was very helpful

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Amazing

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Can you prove the quadratic formula? Jason, here is an idea for you. Why not make videos in terms of math proofs? I am sure that math majors would love you for it.

Welldone 🎉

Thanks teacher ❤

At 7:58 why do you have to divided by 2 and square root answer please I need really help please I hope you reply.

Thanks

This method is called Sridharacharaya method discovered in 10th century AD by Indian mathemetician

I would like to see more of this

Hi, I have taught high school and college math for over 30 years. I always learn some tips from watching your lessons. Do you teach calculus? Robert

Quadratic Formula is Known as Sri Dharacharya Fomula Which is Derived from Indian Mathematician

I like the way you teach

At 7:58 why do you have to divided by 2 and square root it pleases response I hope you see it

Thanks you very much

why is b/ax divided by 2 then squared? WHy not do the same with x squared and -c/a?

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Hello there I'm studying the AQA foundation and I wondered if you could tell me how does one know when to apply the Elimination process t o simultaneous equation and when to apply substitution what is the distinctive different that I should know please.? Is it when there's an X Square coefficient

Please tell me about the i. I'm jus learning all this.

Nice 👍

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I’m 22. I missed my math test by 5 points. Hands down the best mathematical/science tutor.

Thank you teacher

an endless accordion of whiteboards! awesome

Here's a fun fact about me: I first learned about the quadratic formula in Geometry.

b^(2) - 4ac = 13

b^(2) - 4ac = -36

at my time we only learnd the pq-formula

b^(2) - 4ac = 20

why do you prime factorise

Fantastic job but i am confused; at 13.19 mins. b/2a.x + b/2a.x = b/a.2x. Please help. Thank you.

Waw nice

I always forget how to derive the quadratic formula from completing the square.

3:52 I keep hearing "Always get 2 solutions", but when I did [3A² = 6A - 3], there was only ONE solution.

#QuadraticEquation

a = 3 b = 1 c = -1

stop looking at the comments and look a the video

(Ques) I 15 min & 35 secs. Why did you square root the denominator & not the numerator.? You only square root 4ac^2 & not the terms above it. Why?

I have some questions here

y^(2) - 4y + 13 = 0 y = (- (-4) + sqrt (-36) ÷ 2 y = (4 + sqrt (-36)) ÷ 2 y = error

sqrt (-36) = error

a = 1 b = 6 c = 4

Oh

You forgot -1 on the equation ! (First example)

sqrt (-36) = invalid input

@19:28 oh it is definitely still considered some form of black magic..

SRIDHARACHARYA RULE

this was not a good this shit made me more confused

Wow learning it today hours before my exam thanks a lot 🤗really helped

Thank you so much

Thank you so much