1/4x^2-21=43

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Solution for 1/4x^2-21=43 equation: 


x in (-oo:+oo)

(1/4)*x^2-21 = 43 // - 43

(1/4)*x^2-43-21 = 0

1/4*x^2 = 64 // : 1/4

x^2 = 256

x^2 = 256 // ^ 1/2

abs(x) = 16

x = 16 or x = -16

x in { 16, -16 }

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