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4 July, 21:04

Factor this trinomial.

х^2 - 9 х + 20

А. (х - 4) (х + 5)

В. (х-2) (х + 10)

С. (х-2) (х - 10)

D. (x-4) (х - 5)

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Answers (2)
  1. 4 July, 22:36
    0
    D

    Step-by-step explanation:

    We're looking for two numbers that have a sum of - 9 and a product of 40. These 2 numbers are - 4 and - 5 so the answer is (x - 4) (x - 5).
  2. 4 July, 23:48
    0
    (x-4) (x-5)

    Step-by-step explanation:

    х^2 - 9 х + 20

    What 2 numbers multiply to 20 and add to - 9

    -4*-5 = 20

    -4+-5 = - 9

    (x-4) (x-5)
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