-2u(u+7)(u-9)=9

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Solution for -2u(u+7)(u-9)=9 equation: 



-2u(u+7)(u-9)=9

We move all terms to the left:

-2u(u+7)(u-9)-(9)=0

We multiply parentheses ..

-2u(+u^2-9u+7u-63)-9=0

We multiply parentheses

-2u^3+18u^2-14u^2+126u-9=0

We do not support eupression: u^3

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