(4/5)*x^2-45=0

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Solution for (4/5)*x^2-45=0 equation: 


x in (-oo:+oo)

(4/5)*x^2-45 = 0

4/5*x^2 = 45 // : 4/5

x^2 = 225/4

x^2 = 225/4 // ^ 1/2

abs(x) = 15/2

x = 15/2 or x = -15/2

x in { 15/2, -15/2 }

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