4x^2-8/10x^3-20x^2

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Solution for 4x^2-8/10x^3-20x^2 equation: 


x in (-oo:+oo)

4*x^2-((8/10)*x^3)-(20*x^2) = 0

(-4/5)*x^3+4*x^2-20*x^2 = 0

-4/5*x^3-16*x^2 = 0

-4*x^2*(1/5*x+4) = 0

1/5*x+4 = 0 // - 4

1/5*x = -4 // : 1/5

x = -4/1/5

x = -20

-4*x^2 = 0

-4*x^2 = 0 // : -4

x^2 = 0

x = 0

x in { -20, 0 }

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