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(x-3)^(2)-(2x+5)^(2)=-16
We move all terms to the left:
(x-3)^(2)-(2x+5)^(2)-(-16)=0
We add all the numbers together, and all the variables
(x-3)^2-(2x+5)^2+16=0
We move all terms containing x to the left, all other terms to the right
(x-3)^2-(2x+5)^2=-16
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