z^2-17+72=(z-8)(z-)

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Solution for z^2-17+72=(z-8)(z-) equation: 



z^2-17+72=(z-8)(z-)

We move all terms to the left:

z^2-17+72-((z-8)(z-))=0

We add all the numbers together, and all the variables

z^2-((z-8)(+z))-17+72=0

We add all the numbers together, and all the variables

z^2-((z-8)(+z))+55=0

We multiply parentheses ..

z^2-((+z^2-8z))+55=0



We calculate terms in parentheses: -((+z^2-8z)), so:

(+z^2-8z)

We get rid of parentheses

z^2-8z

Back to the equation:

-(z^2-8z)



We get rid of parentheses

z^2-z^2+8z+55=0

We add all the numbers together, and all the variables

8z+55=0

We move all terms containing z to the left, all other terms to the right

8z=-55

z=-55/8

z=-6+7/8

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