Question

if one root of quadratic equation 2x2 + Kx - 6 = 0 is 2 fins value of K

Answer 1

Step-by-step explanation:

A/Q, x=2

so,

=2×2+2k-6=0

=4+2k-6=0

=2k=2

=k=1

Answer 2

Step-by-step explanation:

Since x=2 is a root of the equation

2x² + kx − 6 = 0

2k+2=0

k=−1

Putting k =-1 in the given equation, we get,

2x² − x − 6 = 0

(x−2)(2x+3) = 0

x=2, -3

2

Hence, the other root is −3.

2