1/25x^2-64 - solution

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Solution for 1/25x^2-64 equation:

x in (-oo:+oo)

(1/25)*x^2-64 = 0

1/25*x^2 = 64 // : 1/25

x^2 = 1600

x^2 = 1600 // ^ 1/2

abs(x) = 40

x = 40 or x = -40

x in { 40, -40 }

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