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(15-2x)^2-x-3=0
We add all the numbers together, and all the variables
(-2x+15)^2-x-3=0
We add all the numbers together, and all the variables
-1x+(-2x+15)^2-3=0
We move all terms containing x to the left, all other terms to the right
-1x+(-2x+15)^2=3
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