(3x)²-(2x+1)(3x-2)=3(x+2)(x-2)
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(3x)²-(2x+1)(3x-2)=3(x+2)(x-2)
(3x)²-(2x+1)(3x-2)=3(x+2)(x-2)
(3x)²-(2x+1)(3x-2)=3(x+2)(x-2)
(3x)²-(2x+1)(3x-2)=3(x+2)(x-2)
9x²-(6x²-4x+3x-2)=3(x²-4)
9x²-6x²+x+2=3x²-12
x=-2-12
x=-14