Question 1 Report
If x - 4 is a factor of x2 - x - k, then k is
Answer Details
Let f(x) = x2 - x - k Then by the factor theorem, (x - 4): f(4) = (4)2 - (4) - k = 0 16 - 4 - k = 0 12 - k = 0 k = 12