SOLUTION: Find the real solutions of the equation 2x4 - 128x2 = 0 by factoring

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Question 1069112: Find the real solutions of the equation 2x4 - 128x2 = 0 by factoring
Answer by Boreal(15235) About Me  (Show Source):
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2x4 - 128x2 = 0
factor out a 2x^2
(2x^2(x^2-64)=0
2x^2(x+8)(x-8)=0, difference of squares
x=0 (multiplicity of 2),-8, 8