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If one root of quadratic equation kx^2-4√5x +5 = 0 is √5 , then K = ______

+3 votes
in JEE by kratos

If one root of quadratic equation kx2-4√5x +5 = 0 is √5 , then K = __

(A) 3

(B) – 3

(C) √5

(D) 5

1 Answer

+2 votes
by kratos
 
Best answer

Correct option (A) 3

Explanation:

Kx2 -4√5x +5= 0 .......(i)

one root √5 (put x √5 in equation (i))

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