390-(3/4)x^2=0

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Solution for 390-(3/4)x^2=0 equation: 


x in (-oo:+oo)

390-((3/4)*x^2) = 0

(-3/4)*x^2+390 = 0

-3/4*x^2 = -390 // : -3/4

x^2 = 520

x^2 = 520 // ^ 1/2

abs(x) = 2*130^(1/2)

x = 2*130^(1/2) or x = -(2*130^(1/2))

x in { 2*130^(1/2), -(2*130^(1/2)) }

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