Question

If -5 is a root of quadratic polynomial 2x2 + px - 15 = 0 and the quadratic equation p (x2+x)p=0 has equal roots find the value of k

Answer 1

$x = - 5 \\ 2x {}^{2} + px - 15 = 0 \\ 2( - 5) {}^{2} - 5p - 15 = 0 \\ 50 - 5p - 15 = 0 \\ - 5p = - 35 \\ p = 7$
write the equation properly to find k.