Question

Which of the following expressions results in 0 when evaluated at x = 4?

A. (x + 6)(x - 2)

B. 4x(x - 6)

C. (x - 10)(x - 4)

D. (x + 4)(x - 10)

Answer 1

Answer: C. (x-10)(x-4)

(x-10)(x-4) put 4 in for x

(4-10)(4-4)=(-6)(0)=0

Answer 2

C

Explanation:

x-4 is zero when x=4

so the one that contains the factor (x-4)

C