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(X+X)^2+3X+X=4026
We move all terms to the left:
(X+X)^2+3X+X-(4026)=0
We add all the numbers together, and all the variables
(+2X)^2+3X+X-4026=0
We add all the numbers together, and all the variables
4X+(+2X)^2-4026=0
We move all terms containing X to the left, all other terms to the right
4X+(+2X)^2=4026
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