4z(z-7)(z+1)=0

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Solution for 4z(z-7)(z+1)=0 equation: 



4z(z-7)(z+1)=0

We multiply parentheses ..

4z(+z^2+z-7z-7)=0

We multiply parentheses

4z^3+4z^2-28z^2-28z=0

We do not support ezpression: z^3

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