# Is it possible to factor y=x^2-21x ? If so, what are the factors?

Jul 29, 2017

It is possible to factor this equation. An $\textcolor{red}{x}$ can be factored from each term on the right side of the equation:
$y = \left(\textcolor{red}{x} \cdot x\right) - \left(\textcolor{red}{x} \cdot 21\right)$
$y = \textcolor{red}{x} \left(x - 21\right)$