4x(x-4)(x+5)=0

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Solution for 4x(x-4)(x+5)=0 equation: 



4x(x-4)(x+5)=0

We multiply parentheses ..

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

We multiply parentheses

4x^3+20x^2-16x^2-80x=0

We do not support expression: x^3

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