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16 May, 21:56

Use the grouping method to factor 4x3 + 20x2 - 3x - 15.

A. (x + 5) (4x2 - 3)

B. 2x (x + 1) (2x - 15) C. (x - 5) (4x2 + 3)

D. (x2 - 5) (4x+3)

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Answers (2)
  1. 16 May, 22:03
    0
    Answer: A.
  2. 16 May, 22:04
    0
    A. (x + 5) (4x^2 - 3).

    Step-by-step explanation:

    4x^3 + 20x^2 - 3x - 15.

    = 4x^2 (x + 5) - 3 (x + 5)

    = (4x^2 - 3) (x + 5).
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