(400-x^2)^1/2

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Solution for (400-x^2)^1/2 equation: 


x in (-oo:+oo)

((400-x^2)^1)/2 = 0

(400-x^2)/2 = 0

-1*x^2 = -400 // : -1

x^2 = 400

x^2 = 400 // ^ 1/2

abs(x) = 20

x = 20 or x = -20

x in { 20, -20 }

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