(X+2)(x-4)=x^2+9

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Solution for (X+2)(x-4)=x^2+9 equation: 



(X+2)(X-4)=X^2+9

We move all terms to the left:

(X+2)(X-4)-(X^2+9)=0

We get rid of parentheses

-X^2+(X+2)(X-4)-9=0

We multiply parentheses ..

-X^2+(+X^2-4X+2X-8)-9=0

We add all the numbers together, and all the variables

-1X^2+(+X^2-4X+2X-8)-9=0

We get rid of parentheses

-1X^2+X^2-4X+2X-8-9=0

We add all the numbers together, and all the variables

-2X-17=0

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

-2X=17

X=17/-2

X=-8+1/2

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