I'm guessing that you can solve for h and k, by first dividing by x-2, and the factoring the resulting polynomial. Say that h = 3 and k = -4. Then h-k = 3-(-4) = 7. hk = -12. Create the two polynomials corresponding to the roots.

(x-7)(x+12). Multiply it out to get the answer.

(I didn't solve the polynomial, I worked backwards to get the answer, but the approach is the same.)