Question

. One of the roots of quadratic equation 2x2 + kx - 2 = 0 is -2, find k​

Answer 1

Answer:

Step-by-step explanation:

x=-2

8-2k-2=0

-2k=-6

k=3

Answer 2

Answer:

2x² + Kx - 2 = 0

x = -2

2(-2)² + k(-2) - 2 = 0

8 - 2K - 2 = 0

6 - 2K = 0

- 2K = 0 - 6

- 2K = - 6

K = - 6 / - 2

K = 3