Question

If (x − 3) is a factor of the polynomial function f(x) = 4x2 − 5x − 21, which of the following is another factor?
(7x − 4)
(7x + 4)
(4x − 7)
(4x + 7)

Answer 1

Answer:

(4x + 7)

Step-by-step explanation:

If you multiply -3 by +7 you get -21.

4x times x is 4x^2. The middle terms -12x +7 add to -5x

Answer 2

Answer:

(4x + 7)

Step-by-step explanation:

If you multiply -3 by +7 you get -21.

4x times x is 4x^2. The middle terms -12x +7 add to -5x

Step-by-step explanation:

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