If the function f(fx) = x3 + 2x2 + qx – 6 is divisible by x + 1, find q
-
A.
-5 -
B.
-2 -
C.
2 -
D.
5
Correct Answer: Option A
Explanation
x + 1 = 0, x = -1; f(x) = x3 + 2x2 + qx – 6
0 = -1 + 2 – q – 6
q = -5
x + 1 = 0, x = -1; f(x) = x3 + 2x2 + qx – 6
0 = -1 + 2 – q – 6
q = -5