Question

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

Answer 1

Step-by-step explanation:

2(-5*-5)+(-5p)=0

2*25-5p=0

50=5p

p=10

condition 2:

10(-5^2+(-5)+k=0

10(25-5)+k=0

200+k=0

so k= -200