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25 May, 21:33

Which of the binominals below is a factor of this trinomial? x2-10x-39

a. x^2+13

b. x-13

c. x+6

d. x-6

+1
Answers (1)
  1. 25 May, 21:42
    0
    b

    Step-by-step explanation:

    given x² - 10x - 39

    since the coefficient of the x² term is 1

    consider the factors of - 39 (constant term) which sum to give - 10 (the coefficient of the x term)

    The factors are - 13 and + 3, hence

    x² - 10x - 39 = (x - 13) (x + 3) ← in factored form

    Hence (x - 13) is a factor → b
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