1/4x^2-1=15

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Solution for 1/4x^2-1=15 equation: 


x in (-oo:+oo)

(1/4)*x^2-1 = 15 // - 15

(1/4)*x^2-15-1 = 0

1/4*x^2 = 16 // : 1/4

x^2 = 64

x^2 = 64 // ^ 1/2

abs(x) = 8

x = 8 or x = -8

x in { 8, -8 }

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