Question

If the sum of the zeroes of the quadratic polynomial 3x2

-kx+6 is 3, then find

the value of k.

​

Answer 1

Step-by-step explanation:

Gven:-

the sum of the zeroes of the quadratic polynomial 3x2-kx+6 is 3.

To find:-

Find the value of k.

Solution:-

Given quadratic polynomial =3x²-kx+6

On comparing with the standard quadratic pilynomial ax²+bx+c then

a=3

b=-k

c=6

Sum of the zeroes = -b/a

=>-(-k)/3

=>k/3

according to the given problem,

Sum of the zeroes =3

=>k/3=3

=>k=3×3

=>K=9

Answer:-

The value of k=9

Answer 2

Answer:

9

Step-by-step explanation:

3x2-kx+6=0

sum of zeros =3

we know that-_-

sum of zeros = -b/a

so, 3= -b/a

3= -(-k)/3

3=k/3

k=3×3

k=9

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