Question

Which of the following polynomial functions has zeros at 7 and -7?

y = (x − 7)2
y = (x + 7)2
y = (x − 2)7
y = (x + 7)(x − 7)

Answer 1

D

Explanation:

y = (x+7) (x-7)

Answer 2

9514 1404 393

Answer:

y = (x + 7)(x − 7)

Explanation:

If 'a' is a zero, then (x -a) is a factor.

If 7 and -7 are zeros, then (x -7) and (x +7) are factors. The appropriate choice is ...

y = (x + 7)(x − 7)