Question

Factorise:
$x^2-24x-180$

Answer 1

$$\begin{gathered} x^2-24x-180 \\ =x^2-30x+6x-180 \\ =x\left(x-30\right)+6\left(x-30\right) \\ =\left(x-30\right)\left(x+6\right) \end{gathered}$$