Question

HELP!!! find all the real zeros of the polynomial function and state their multiplicities P P(x)=x^4-2x^2+8x-8

Answer 1

Try to factor first.

Answer 2

I got -1\[\pm \sqrt{-7} /2\]

Answer 3

for the 1st one

Answer 4

x^4-5x^2+4 =x^4-4x^2-x^2+4=0
x^2(x^2-4)-1(x^2-4)=0
(x^2-4)(x^2-1)=0