Question:

X(x^3+3x^2-4x)+2x^2=?

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A. x^3+5x^2-4x

B. x^3+6x^2-3x

C. x^4+3x^3-2x^2

D.x^4+4x^3-x^2

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  1. X(X^3 + 3X^2 -4X) +2X^2 ( distrubute X first )

    (X^4 + 3X^3 -4X^2) +2X^2 ( combine like terms )

    X^4 +3X^3 -2X^2

    C is the answer.

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