Question

if -1/2 is one of the root of quadratic equation 2x+kx+1=0 find k

Answer 1

your question is wrong.. bcoz given equation in not quadration










2×(-1/2)² +k×(-1/2) +1 =0
(3-k) /2=0
k=3.

Answer 2

Here is your answer

put the value of x in equation We get

$2( - 1 \div 2) + k( - 1 \div 2) + 1 = 0 \\ multiply \: by \: 2 \\ - 2 - k + 2 = 0 \\ - k = 0 \\ k = 0$
Hope it helps you