Question

If the sum of zeroes of the Quadratic
Polynomial
$3x {}^{2} - kx + 6$
Is 3 find the value of
$k$


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Answer 1

Hi there !!

3x² - kx + 6

It is given that sum of the zeroes is 3

$\alpha + \beta = 3 = \frac{ - b}{a}$

Now, Coefficient of x² => a =3

b= -k

c= 6

a + B = -b/a

3 = k/3

K = 9

Thankyou :)