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27 October, 16:02

The partial factorization of x2 - 3x - 10 is modeled with algebra tiles.

Which unit tiles are needed to complete the factorization?

2 negative unit tiles

2 positive unit tiles

5 negative unit tiles

5 positive unit tiles

+2
Answers (2)
  1. 27 October, 16:08
    0
    The answer is positive 2
  2. 27 October, 16:14
    0
    X² - 3x - 10

    x² = x * x

    10 can be factored:

    1 x 10

    2 x 5 This is the correct pair.

    (x-5) (x+2)

    x (x+2) - 5 (x+2) = x² + 2x - 5x - 10 = x² - 3x - 10

    x-5 = 0

    x = 5

    x + 2 = 0

    x = - 2
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