How to simplify (x^3-x^2-42x)

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Simplify (x^3-x^2-42x)/(2x^2-20x+42)

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Digital SAT Math Question using the SIMPLIFY method: 2x^3 + 42x^2 + 208x

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One of the factors of 2x^3 + 42x^2 + 208x is x + b, where b is a positive constant. What is the...

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