Question

If (x + 3)(x - k) = x2 - 2x - 15, what is the value of k?

Answer 1

Answer:

∴GCD of x2 − 2x − 15 and x3 + 27 is x + 3. It is given that x + k is the G.C.D of x2 − 2x − 15 and x2 + 27. Comparing x + 3 with x + k, we get k = 3.