Question

Factor completely p4 – 18p2 + 81.

Answer 1

put \[p ^{2} = a\]

So your function becomes

\[a ^{2} - 18a + 81\]

Now factor this quadratic you will get two factors (a ) (a )

Now replace \[a \space with \space p ^{2}\]

Answer 2

you get 2 more quadratics now factor them again

Answer 3

I'm sorry this took so long. I did see your reply and I wanted to say thanks for your help! :)