Question

X^2-2x-15 Which of the binomials below is a factor of the following trinomial?

Answer 1

See below.

Explanation:

x² - 2x - 15

To factor, you need two numbers whose product is -15 and whose sum is -2. The numbers are -5 and 3 since -5 × 3 = -15 and -5 + 3 = -2. Then the factorization is

x² - 2x - 15 = (x - 5)(x + 3)

Since you don't list choices, choose one of the two binomials above.