What is the derivation of quadratic equation formula

Quadratic equations

It is found by completing the square on the standard quadratic equation, Ax^2 +Bx +C=0. Remember to take C to the other side, and divide by A so you just have x^2 and then complete the square; you'll get the quadratic formula.

Completing the square for ax² + bx + c = 0

0 because a, b, and c are all constants

[-b+ or - sqrt(b^2-4ac) ]/2a

y=axx+bx+c
Y'=2ax+b ans