Question

Factorise:
$p^2+6p+8$

Answer 1

$p^2+6p+8=p^2+4p+2p+8\left\{\begin{array}{cc}\because 8=4\times 2& \\ 6=4+2& \end{array}\right\}=p(p+4)+2(p+4)=(p+4)(p+2)$