Quadratic (Leaving Cert Mathematics): Flashcards

Factorising expressions of form $ax^2+bx+c$

$2$

$ax^2+bx+c$

Two points where curve crosses the $x$-axis

Two

Quadratic formula (or $-b$-formula)

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

Coefficient of the $x^2$ term

Coefficient of the $x$ term

Constant term

Use formula twice: once with $+$, once with $-$