Question 922413
(px+q)^2=9x^2+kx+16
p^2x^2 + 2pqx + q^2 = 9x^2+kx+16
p^2 = 9  , p = ±3
q^2 = 16 , q = ± 4
...
2pq = k 
(D) k = 24 works