My friend asked me for math help for her pre-calc class and I can't for the life of me do the problem--- I'm out of practice.
Solve for x:
x^4-3x^2+2=0.
I still tried those and they aren't working.
When substituting 2 (for all intents and purposes it works for the -2 too because of the squaring...) the equation ends up being
2^4 - 3(2^2) +2 which is..
16-12+2
which is 6.
The 1, -1 do work, though. My brains are frieeeeed.