X=1/4x^2-9

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Solution for X=1/4x^2-9 equation: 


x in (-oo:+oo)

X = (1/4)*x^2-9 // - (1/4)*x^2-9

X-((1/4)*x^2)+9 = 0

X+(-1/4)*x^2+9 = 0

-1/4*x^2 = -(X+9) // : -1/4

x^2 = 4*(X+9)

x^2 = 4*(X+9) // ^ 1/2

abs(x) = 2*(X+9)^(1/2)

x = 2*(X+9)^(1/2) or x = -(2*(X+9)^(1/2))

x in { 2*(X+9)^(1/2), -(2*(X+9)^(1/2)) }

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