SOLUTION: x^4-17x^2+16=0

Question 174055This question is from textbook Algebra 2
: x^4-17x^2+16=0 This question is from textbook Algebra 2

Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
x^4-17x^2+16=0
Factor:
x^4 -16x^2-x^2+16 = 0
x^2(x^2-16) -(x^2-16) = 0
(x^2-16)(x^2-1) = 0
(x-4)(x+4(x-1)(x+1) = 0
x = 4 or -4 or 1 or -1
==========================
Cheers,
Stan H.
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