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X^2-2X=(X+2)(X-3)
We move all terms to the left:
X^2-2X-((X+2)(X-3))=0
We multiply parentheses ..
X^2-((+X^2-3X+2X-6))-2X=0
We calculate terms in parentheses: -((+X^2-3X+2X-6)), so:We add all the numbers together, and all the variables
(+X^2-3X+2X-6)
We get rid of parentheses
X^2-3X+2X-6
We add all the numbers together, and all the variables
X^2-1X-6
Back to the equation:
-(X^2-1X-6)
X^2-2X-(X^2-1X-6)=0
We get rid of parentheses
X^2-X^2-2X+1X+6=0
We add all the numbers together, and all the variables
-1X+6=0
We move all terms containing X to the left, all other terms to the right
-X=-6
X=-6/-1
X=+6
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