A-Level Maths: B3-16 [Quadratics: Where the Quadratic Formula Comes From]

[kristinak]

I don't usually leave comments but just wanted to say thank you so much for taking your time to make videos and explain this stuff that usually makes mathematics quite scary. Thank you for being really helpful to understand this cool language. Ive used your videos to catch up on my GCSE's. Even though i did okay in maths back in school after 10 years being out of it was quite scary. Now that Im doing A-levels to get me into university. Well, just so you know, your efforts aren't wasted. BIG thank you again.

[catalinaignat]

Suddenly life is clicking together thank youuuu I always wondered how this formula was madeee!!!!

[StermaPerma]

You’re a lifesaver thank you so much for all the videos. If there was something like this for all A-levels, people would be much better prepared for exams.

[dennispage]

Brilliant breakdown in 7 minutes to go with completing the square when X is not 1

[SM-dsmh]

:O shook! Finally I know what and why I’m doing things in math. These techniques actually can be used in real life situations.

[martas]

Maths is magic
In my life time I really want to get a masters degree in maths ♡♡
Sir, i want to be a clear and explicit-treaching teacher like you to turn inflexible knowledge to flexible knowledge

[xkl-physics]

Sir instead of completing the square to find the vertex (turning point) of a quadratic could you find the midpoint of the two roots of the quadratic which would give you the x co ordinate of the vertex. Then substitute the x coordinate of the vertex into the equation to get the y Co ordinate of the vertex?

[Masowe.]

wow, there is thought in this. It was just presented to me

[biybimaryamjoldasbaeva]

can we find vertex by using factorisation?

[aaronlang]

Would we need to know the derivation of this for the exams?