Question

If one of the roots of the Quadratic equation Kx2 +2x -8 = 0 is -2, then what is the value of K?

a) 2 b) 3 c) 1 d) 4​

Answer 1

Answer:

putting the value of X = -2

k -2^2 + 2 (-2) - 8

4K - 4 - 8

4K - 12 = 0

4K = 12

K = 3