Question

FACTOR COMPLETELY HELP! (a^2+1)^2-84(a^2+1)+164

Answer 1

I substituted x for \[a ^{2}+1\] so now the equation is \[x ^{2}-8x+164\]

Answer 2

(x-2)(x-82)

Answer 3

then I plug in but do not get the right answer.

Answer 4

http://openstudy.com/study#/updates/5306846ee4b022471a65951e

Answer 5

OH! (a-1)(a+1)(a+9)(a-9) got it. Nevermind :)

Answer 6

hmmm

Answer 7

what did you end up with?

Answer 8

(a-1)(a+1)(a+9)(a-9)