If the function f is defined by f(x + 2) = 2x(^2) + 7x – 5, find f(-1)
-
A.
-10 -
B.
-8 -
C.
4 -
D.
10
Correct Answer: Option B
Explanation
f(x + 2) = f(-1)
f(-1) is gotten when x = -3.
(2x^{2} + 7x – 5) at x = -3.
f(-1) = (2(-3)^{2} + 7(-3) – 5)
= (18 – 21 – 5 = -8)