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(x+2)^2+(x-2)^2=(2x)^2
We move all terms to the left:
(x+2)^2+(x-2)^2-((2x)^2)=0
determiningTheFunctionDomain (x+2)^2+(x-2)^2-2x^2=0
We add all the numbers together, and all the variables
-2x^2+(x+2)^2+(x-2)^2=0
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