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9 December, 20:55

Which expression is equivalent to

(x2 - 5x) (3x2 + 2x - 9) ?

A. x2 (3x2 + 2x) - 5x (2x - 9)

B. x2 (3x2 + 2x - 9) - 5x (3x2 + 2x - 9)

C. x2 (3x2 + 2x - 9) + 5x (3x2 + 2x - 9)

D. x2 (3x2 + 2x - 9) - 5x

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Answers (1)
  1. 10 December, 00:22
    0
    For this case we have the following expression:

    (x2 - 5x) (3x2 + 2x - 9)

    Rewriting we have:

    (3x4 + 2x3 - 9x2) + (-15x3 - 10x2 + 45x)

    3x4 - 13x3 - 19x2 + 45x

    An equivalent expression is given by:

    x2 (3x2 + 2x - 9) - 5x (3x2 + 2x - 9)

    Answer:

    B. x2 (3x2 + 2x - 9) - 5x (3x2 + 2x - 9)
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