Question

if 1/2
is a root of the equation x2+kx-5/4=0, then the value of k is a. 1/2 b. -2 c. 1/4 d. 2​

Answer 1

Answer:

option d) 2

Step-by-step explanation:

x2+kx _5/4

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

1/4+2k-5/4

-2k=1/4-5/4

-2k=-4

-k= -4/2

-k= -2

k=2..