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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
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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.
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