(X+2)(x+1)=x2+11

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Solution for (X+2)(x+1)=x2+11 equation: 



(X+2)(X+1)=X2+11

We move all terms to the left:

(X+2)(X+1)-(X2+11)=0

We add all the numbers together, and all the variables

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

We get rid of parentheses

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

We multiply parentheses ..

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

-1X^2+X^2+X+2X+2-11=0

We add all the numbers together, and all the variables

3X-9=0

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

3X=9

X=9/3

X=3

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