If −5 is a root of the quadratic equation 2x2+px−15=0 and the quadratic equation p(x2+x)+k=0 has equal roots, find the value of k.
-3 is a root of the quadratic equation 2x2 +px - 15 = 0. For what value of q , the equation p(x2 + x ) + q= 0 has equal roots?