Question 12
PolynomialsIf x − 4 is a factor of x2 − x − k, then k is
- A.20
- B.2
- C.4
- D.12
Show the answer and explanation
Answer: D (12)
Explanation
By the factor theorem, x = 4 gives 16 − 4 − k = 0, so k = 12.
If x − 4 is a factor of x2 − x − k, then k is
Answer: D (12)
By the factor theorem, x = 4 gives 16 − 4 − k = 0, so k = 12.