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(2x-3)^2=2x^2-18
We move all terms to the left:
(2x-3)^2-(2x^2-18)=0
We get rid of parentheses
-2x^2+(2x-3)^2+18=0
We move all terms containing x to the left, all other terms to the right
-2x^2+(2x-3)^2=-18
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