Question

7.If the sum of zeroes of the quadratic polynomial 3x2 – kx + 6 is 3, then find the value of k.​

Answer 1

Answer:

i hope this attachment may help u

Answer 2

Answer:Answer

Correct option is

A

9

In a general quadratic equation of form ax  

2

+bx+c=0, sum of roots are by  

a

−b

​

.

In the given quadratic equation, 3x  

2

−kx+6=0

a=3,b=−k,c=6

Sum of roots =  

a

−b

​

=  

3

−(−k)

​

=  

3

k

​

 

and sum of roots is given 3

⇒  

3

k

​

=3

⇒  

k=9