(x+1)(x-2)=x*x+2

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



(x+1)(x-2)=x*x+2

We move all terms to the left:

(x+1)(x-2)-(x*x+2)=0

We get rid of parentheses

(x+1)(x-2)-x*x-2=0

We multiply parentheses ..

(+x^2-2x+x-2)-x*x-2=0

Wy multiply elements

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

We get rid of parentheses

x^2-1x^2-2x+x-2-2=0

We add all the numbers together, and all the variables

-1x-4=0

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

-x=4

x=4/-1

x=-4

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