The Quadratic Formula (AQA GCSE Maths): Flashcards

$x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}$

$ax^2 + bx + c = 0$

Gives two solutions (one with +, one with -)

$b^2 - 4ac$

$2a$ (not just $a$)

Minus signs

Roots

Won't factorise easily or need decimals/surds/exact answers

Rearrange into standard form $ax^2 + bx + c = 0$

Coefficients