Question

if 1/2 is a root of the equation x^2+k x-5/4=0, then the value of k is (a) 2 (b) -2 (c) 1/4(d) 1/2

Answer 1

Answer:

since 1/2 is a root of given equation

therefore put value of x in given equation we get

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

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

(1-5)/4 + k/2 =0

-4/4 + k/2 =0

-1 + k/2 =0

k/2 =1

k = 2

Answer 2

Answer:

The answer is a option C