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(2x+5)2-(x+3)2=2
We move all terms to the left:
(2x+5)2-(x+3)2-(2)=0
We multiply parentheses
4x-2x+10-6-2=0
We add all the numbers together, and all the variables
2x+2=0
We move all terms containing x to the left, all other terms to the right
2x=-2
x=-2/2
x=-1
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