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(2x+3)^2-x-1=(2x+5)(2x-5)
We move all terms to the left:
(2x+3)^2-x-1-((2x+5)(2x-5))=0
We add all the numbers together, and all the variables
-1x+(2x+3)^2-((2x+5)(2x-5))-1=0
We use the square of the difference formula
4x^2-1x+(2x+3)^2+25-1=0
We add all the numbers together, and all the variables
4x^2-1x+(2x+3)^2+24=0
We move all terms containing x to the left, all other terms to the right
4x^2-1x+(2x+3)^2=-24
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