Question

Find the factors.

(14) s² – 2s – 399

Answer 1

The factors of s² – 2s – 399 are:
$$\begin{gathered} s^2-2s-399 \\ =s^2-21s+19s-399 \\ =s\left(s-21\right)+19\left(s-21\right) \\ =\left(s-21\right)\left(s+19\right) \end{gathered}$$