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(X2+3X+1)(X2+3X-3)=5
We move all terms to the left:
(X2+3X+1)(X2+3X-3)-(5)=0
We add all the numbers together, and all the variables
(+X^2+3X+1)(+X^2+3X-3)-5=0
We move all terms containing X to the left, all other terms to the right
(+X^2+3X+1)(+X^2+3X-3)=5
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