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2x^3-9x^2+27=0 2x^3-6x^2-3x^2+27=0 2x^2(x-3)-3(x^2-9)=0 2x^2(x-3)-3(x+3)(x-3)=0 (x-3)(2x^2-3x-9)=0 (x-3)(2x+3)(x-3)=0 x=3 or x=-3/2
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