Given that x = -5 is a root to the quadratic 2x^2 + px - 15 = 0, and the quadratic equation p(x^2 + x) + k = 0 has equal roots, find k.
2(−5)^2−5p−15=0 which solves to p=7
Then we get 7x^2+7x+k=0
b2−4ac has to = to 0 so k = 7/4
Very nice, qjin !!!