Question

If -5 is a root of the quadratic equation 2x2+px-15=0, find the value of p

Answer 1

Answer:

2x5^2 +p(5) - 15 = 0

50-15+5p =0

35=-5p

P=-7

Answer 2

Step-by-step explanation:

1) 4 + px - 15 = 0

2) 4 + p (-5) - 15 = 0

3) 4 + p (20) = 0

4) 4 + 20p = 0

5) 4 -0 = 20p

6) 4 = 20p

7) p = 20/4

8)p = 5