Answers

  • Brainly User
2014-11-04T18:50:10+05:30
Just substitute the root in the equation, you have 2(-1/2)²+k(-1/2)+1=0 ⇒ k=3
0
2014-11-04T18:58:54+05:30
Given x= -1/2
THen A.T.Q

2x² + kx + 1 =0

Putting the value of x in the equation

2(-1/2)² + k(-1/2) + 1 = 0

2/4  - k/ 2 = -1

1/2 - k/2 = -1

1-k =  -1
2

1-k= -2 

-k= -3
k= 3
1 5 1