x^3-9/4x

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Solution for x^3-9/4x equation: 


x in (-oo:+oo)

x^3-((9/4)*x) = 0

x^3+(-9/4)*x = 0

x^3-9/4*x = 0

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

1*x^2 = 9/4 // : 1

x^2 = 9/4

x^2 = 9/4 // ^ 1/2

abs(x) = 3/2

x = 3/2 or x = -3/2

x = 0

x = 0

x in { 3/2, -3/2, 0 }

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