How to solve (x+2)^2 - (x-3)^2 = 3 (3x-3)-15?
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(x+2)^2 - (x-3)^2 = 3(3x -3) -15
x^2 +4 +4x -x^2 -9 +6x = 9x-9-15
10x -5 = 9x-24
x=-19
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