X^2-15x+56=(x-7)(x-8)

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Solution for X^2-15x+56=(x-7)(x-8) equation: 



X^2-15X+56=(X-7)(X-8)

We move all terms to the left:

X^2-15X+56-((X-7)(X-8))=0

We multiply parentheses ..

X^2-((+X^2-8X-7X+56))-15X+56=0



We calculate terms in parentheses: -((+X^2-8X-7X+56)), so:

(+X^2-8X-7X+56)

We get rid of parentheses

X^2-8X-7X+56

We add all the numbers together, and all the variables

X^2-15X+56

Back to the equation:

-(X^2-15X+56)



We add all the numbers together, and all the variables

X^2-15X-(X^2-15X+56)+56=0

We get rid of parentheses

X^2-X^2-15X+15X-56+56=0

We add all the numbers together, and all the variables

=0

X=0/1

X=0

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