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

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



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

We move all terms to the left:

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

We get rid of parentheses

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

We multiply parentheses ..

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

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

We add all the numbers together, and all the variables

=0

X=0/1

X=0

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