2012 · Q16
If x - 2 is a factor of x^3 + kx^2 - 2x - 24 then what is the value of k?
Elementary MathematicsAlgebra
- A6
- B5
- C1
- D-2
Explanation
Substituting x = 2: 8 + 4k - 4 - 24 = 0 gives k = 5.
If x - 2 is a factor of x^3 + kx^2 - 2x - 24 then what is the value of k?
Explanation
Substituting x = 2: 8 + 4k - 4 - 24 = 0 gives k = 5.