If (x+3) is a factor of f(x)=x^3+qx-4x-12 then the value of q is.
1) -3
2) 4
3) -9
4) none of these
Answers
Answered by
2
Answer:
q = -9
Step-by-step explanation:
If (x+3) is a factor, -3 is a zero of the polynomial
f(-3) = -27 - 3q + 12 - 12 = 0
=> 3q = -27
=> q = -9
Answered by
0
Answer:
3) = -9
Step-by-step explanation:
x + 3 = 0
x = -3
f(x) = x^3 + qx - 4x - 12
f(-3) = (-3)^3 + q(-3) - 4(-3) -12
-27 - 3q +12 -12 = 0
-27 -3q = 0
-3q = 27
q = -9
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