RRB Paramedical Staff Nurse Model Paper 10

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Question : 54 of 100

Marks: +1, -0

If one root of

x^2−6kx+5=0

is 5 then the value of k is

-1/2
-1
1
2

Solution:

If 5 is root of the equation

x^2−6kx+5=0

then

(5)^{2}-6(5) k+5=25-30 k+5=0

30k = -30 ⇒ k = 1

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