Question

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

Answer 1

Answer:

Given= root of P(x) is -2

To find = K

Simply substitute -2 in place of x in P(x)

2(-2)²+k(2)-2 =0

8+2k-2=0

6+2k=0

2k= -6

K= -3