Question

1
If is 1/2 a root of the equation x^2+kx-5/4= 0, then the value of k is:
(a) 3
(b) 4
(c) 5
(d) 2
step by step ​

Answer 1

Answer:

Given:- x^2+kx-5/4= 0 and one roots of the equation is 1/2

To Find Value of K.

Step-by-step explanation:

Solution:-

Put x=1/2 in x^2+kx-5/4= 0

we get (1/2)² + k/2 -5/4=0

=> 1/4+ k/2 -5/4=0

=> 1+ 2k- 5=0

=> 2k -4=0

=>2k=4

=> k = 2

hence K is equal to 2.