Question

The value of k for which 3 is a root of the equation kx² – 7x + 3 = 0 is 

A) -3 

B) 3 

C) 2 

D) -2

Answer 1

Correct option is (C) 2

Given that 3 is a root of the equation \(kx^2-7x+3=0\)

\(\therefore k.3^2-7.3+3=0\)

\(\Rightarrow\) 9k - 21 + 3 = 0

\(\Rightarrow\) 9k - 18 = 0

\(\Rightarrow k=\frac{18}9=2\)

Answer 2

Correct option is C) 2