Question

If the zeros of f(x) are x=-1 and x=2, then the zeros of f(x/2) are

A. -1, 2
B. -1/2, 5/2
C. -3/2, 3/2
D. -1/2, 1
E. -2/4

Answer 1

`\Large \boxed{\mathrm{E. \ -2, \ 4}}`

Explanation:

The zeros of f(x/2) will double the zeros of f(x).

x = -1 × 2 = -2

x = 2 × 2 = 4

Answer 2

E (-2, 4).

Explanation:

(x/2 + 1)(x/2 - 2) = 0

x/2 = -1, x/2 = 2

x = -2, 4.

The roots will be 2 times the roots of f(x).