3a^3-12a^2/15a^2

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Solution for 3a^3-12a^2/15a^2 equation: 


a in (-oo:+oo)

3*a^3-(((12*a^2)/15)*a^2) = 0

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

3*a^3-4/5*a^4 = 0

a^3*(3-4/5*a) = 0

3-4/5*a = 0 // - 3

-4/5*a = -3 // : -4/5

a = -3/(-4/5)

a = 15/4

a^3 = 0

1*a^3 = 0 // : 1

a^3 = 0

a = 0

a in { 15/4, 0 }

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