12x^3-21x^2/3x^2

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Solution for 12x^3-21x^2/3x^2 equation: 


x in (-oo:+oo)

12*x^3-(((21*x^2)/3)*x^2) = 0

12*x^3-7*x^4 = 0

12*x^3-7*x^4 = 0

x^3*(12-7*x) = 0

12-7*x = 0 // - 12

-7*x = -12 // : -7

x = -12/(-7)

x = 12/7

x^3 = 0

1*x^3 = 0 // : 1

x^3 = 0

x = 0

x in { 12/7, 0 }

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