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X2 5x. X3+5x2-x-5 0. X2-2x-5=0. (5x-2)(-x+3)=0. X/3+X-2/5.
X3+5x2-x-5 0. X2-2x-5=0. (5x-2)(-x+3)=0. X/3+X-2/5.

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