4x-5/2x^3

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Solution for 4x-5/2x^3 equation: 


x in (-oo:+oo)

4*x-((5/2)*x^3) = 0

(-5/2)*x^3+4*x = 0

4*x-5/2*x^3 = 0

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

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

x^2 = 8/5

x^2 = 8/5 // ^ 1/2

abs(x) = (8/5)^(1/2)

x = (8/5)^(1/2) or x = -(8/5)^(1/2)

x = 0

x = 0

x in { (8/5)^(1/2), -(8/5)^(1/2), 0 }

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