(x/2)^2=100

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Solution for (x/2)^2=100 equation: 


x in (-oo:+oo)

(x/2)^2 = 100 // - 100

(x/2)^2-100 = 0

1/4*x^2 = 100 // : 1/4

x^2 = 400

x^2 = 400 // ^ 1/2

abs(x) = 20

x = 20 or x = -20

x in { 20, -20 }

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