# How do you use zeros to write quadratic functions in standard form x=2 or x=-1?

Jul 8, 2016

color(green)(x^2-x-2=0
If the zeros of a quadratic are at $x = \textcolor{red}{2}$ and x=color(blue)(""(-1))
color(white)("XXX")(x-color(red)(2))*(x-color(blue)(""(-1)))=0
$\Rightarrow {x}^{2} - x - 2 = 0 \textcolor{w h i t e}{\text{XXX}}$which is in standard form