Question

find k if x=-2 is a root if equation 2x^2+kx-2=0​

Answer 1

Answer:

Step-by-step explanation:

2x^2 + kx - 2 = 0

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

2(4) - 2k - 2 = 0

8 - 2 = 2k

   2k = 6

     k = 3