Question

If -5 is a root of the quadratic equation 2x' + px -15 = 0, and the quadratic equation
p(2 + x) + k = O has equal roots, find the value of k.​

Answer 1

Answer:

p=7, k=21

Step-by-step explanation:

2x²+px-15=0

x= -5

2(-5)²+p(-5)-15=0

2(25)-5p-15=0

50-5p-15=0

35-5p=0

-5p= -35

5p=35

p=35/5

p=7

p(2+x)+k=0

7{2+(-5)}+k=0

7(-3)+k=0

-21+k=0

k=21

Answer 2

Answer:

there's a little change in the question... hope it 'll help..

Step-by-step explanation:

the question is as follows...

QUESTION) if - 4 is a root of the quadratic equation x² + 3x - 4 = 0 and the quadratic equation x² + 3x + k = 0 has equal roots find the value of k.