72=(x)(x-1)(x+9)

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Solution for 72=(x)(x-1)(x+9) equation: 



72=(x)(x-1)(x+9)

We move all terms to the left:

72-((x)(x-1)(x+9))=0

We multiply parentheses ..

-(x(+x^2+9x-1x-9))+72=0



We calculate terms in parentheses: -(x(+x^2+9x-1x-9)), so:

x(+x^2+9x-1x-9)

We multiply parentheses

x^3+9x^2-1x^2-9x

We do not support expression: x^3

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