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4 May, 01:36

When factored, the trinomials x^2-2x-15 and x^2-9x+20 have one binomial factor in common. What is this factor?

1. x-7

2. x+7

3. x-5

4. x+5

+5
Answers (1)
  1. 4 May, 02:41
    0
    X^2-2x-15

    (x-5) (x+3)

    Proof:

    -5+3=-2

    -5*3=-15

    x^2-9x+20

    (x-4) (x-5)

    Proof:

    -4-5=-9

    -4*-5=20

    Final answer: (x-5)
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