-4/7x^2+7=0 - solution

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Solution for -4/7x^2+7=0 equation:

x in (-oo:+oo)

(-4/7)*x^2+7 = 0

-4/7*x^2 = -7 // : -4/7

x^2 = 49/4

x^2 = 49/4 // ^ 1/2

abs(x) = 7/2

x = 7/2 or x = -7/2

x in { 7/2, -7/2 }

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