Question 13
PolynomialsIf 2x2 − kx − 12 is divisible by x − 4, find the value of k.
- A.4
- B.5
- C.6
- D.7
Show the answer and explanation
Answer: B (5)
Explanation
By the factor theorem, x = 4 gives zero: 32 − 4k − 12 = 0, so k = 5.
If 2x2 − kx − 12 is divisible by x − 4, find the value of k.
Answer: B (5)
By the factor theorem, x = 4 gives zero: 32 − 4k − 12 = 0, so k = 5.