Question

If r=3 is a root of quadratic equation kr²-kr-3=0 then the value of k is: a. 1/2 b.2 c.-2 d.-1/2 ​

Answer 1

Step-by-step explanation:

Since r=3 is a root of the equation,

k(3)^2-k(3)-3=0

9k-3k-3=0

6k=3

k=1/2

The correct option is A.

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