Question 1120419

Factor: 9(p−1)+(p−1)^2
<pre>{{{9(p - 1) + (p - 1)^2}}}
9(p - 1) + (p - 1)(p - 1)
(p - 1)[9 + (p - 1)]
{{{highlight_green((p - 1)(p + 8))}}}