Question

The sum of the zeroes of the quadratic polynomial 2x²-kx +3 is 2 , the value of k is  1 2 3 4​

Answer 1

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