Question

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

Answer 1

Answer:

Step-by-step explanation:

Solution :)

Given,

The quadratic eq is 3x²-kx+6

• The sum of roots of quadratic eq is 3

We know that, the sum of roots of quadratic equation is given by

\large \mathtt{\fbox{Sum \: of \: roots - \frac{b}{a}}} =

Thus,

3 = -(-k/3)

3 = k/3

k= 3 x 3

k = 9

Hence, the value of k is 9

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