2012 · Q34
If the expression x^3 + 4x^2 + 4x + k has (x + 4) as a factor, then what is the value of k?
Elementary MathematicsAlgebra
- A-16
- B16
- C32
- D-32
Explanation
Substituting x = -4: -64+64-16+k = 0 gives k = 16.
If the expression x^3 + 4x^2 + 4x + k has (x + 4) as a factor, then what is the value of k?
Explanation
Substituting x = -4: -64+64-16+k = 0 gives k = 16.