If the function f fx x3 2x2 qx - 6 is divisible... - JAMB Mathematics 1997 Question
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 option: a
x + 1 = 0, x = -1; f(x) = x3 + 2x2 + qx - 6
0 = -1 + 2 - q - 6
q = -5
0 = -1 + 2 - q - 6
q = -5
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