Question

Find the factors.

(5) p² – p – 420

Answer 1

The factors of p² – p – 420 are:
$$\begin{gathered} p^2-p-420 \\ =p^2-21p+20p-420 \\ =p(p-21)+20(p-21) \\ =\left(p-21\right)\left(p+20\right) \end{gathered}$$