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

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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