(x^4-1)/2 - solution

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Solution for (x^4-1)/2 equation:

x in (-oo:+oo)

(x^4-1)/2 = 0

1*x^4 = 1 // : 1

x^4 = 1

x^4 = 1 // ^ 1/4

abs(x) = 1

x = 1 or x = -1

x in { 1, -1 }

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