-4z(z+5)(z-7)=0

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Solution for -4z(z+5)(z-7)=0 equation: 



-4z(z+5)(z-7)=0

We multiply parentheses ..

-4z(+z^2-7z+5z-35)=0

We multiply parentheses

-4z^3+28z^2-20z^2+140z=0

We do not support ezpression: z^3

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