(X+1)(x+2)=(x+11)(x-2)

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Solution for (X+1)(x+2)=(x+11)(x-2) equation: 



(X+1)(X+2)=(X+11)(X-2)

We move all terms to the left:

(X+1)(X+2)-((X+11)(X-2))=0

We multiply parentheses ..

(+X^2+2X+X+2)-((X+11)(X-2))=0



We calculate terms in parentheses: -((X+11)(X-2)), so:

(X+11)(X-2)

We multiply parentheses ..

(+X^2-2X+11X-22)

We get rid of parentheses

X^2-2X+11X-22

We add all the numbers together, and all the variables

X^2+9X-22

Back to the equation:

-(X^2+9X-22)



We get rid of parentheses

X^2-X^2+2X+X-9X+2+22=0

We add all the numbers together, and all the variables

-6X+24=0

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

-6X=-24

X=-24/-6

X=+4

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