Question

if 1/2 is a root of x^2- kx- 5/4=0, then find k​

Answer 1

Answer:

k = -2

Step-by-step explanation:

let x=1/2

substituting in the given equation : x^2-kx-5/4=0

(1/2)^2-K(1/2)-5/4=0

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

-4-2k/4=0

-4=2k

k= -2

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