4/5x^2=20

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Solution for 4/5x^2=20 equation: 


x in (-oo:+oo)

(4/5)*x^2 = 20 // - 20

(4/5)*x^2-20 = 0

4/5*x^2 = 20 // : 4/5

x^2 = 25

x^2 = 25 // ^ 1/2

abs(x) = 5

x = 5 or x = -5

x in { 5, -5 }

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