If the function f(fx) = x3 + 2×2 + qx – 6 is divisible by…

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Mathematics JAMB 1997

If the function f(fx) = x3 + 2x2 + qx – 6 is divisible by x + 1, find q

  • -5 checkmark
  • -2
  • 2
  • 5

The correct answer is: A

Explanation

x + 1 = 0, x = -1; f(x) = x3 + 2x2 + qx - 6

0 = -1 + 2 - q - 6

q = -5
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