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(X-3)2+(X+1)2=13
We move all terms to the left:
(X-3)2+(X+1)2-(13)=0
We multiply parentheses
2X+2X-6+2-13=0
We add all the numbers together, and all the variables
4X-17=0
We move all terms containing X to the left, all other terms to the right
4X=17
X=17/4
X=4+1/4
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