Question

1.If the sum of zeroes of the quadratic polynomial 3x2 – kx + 6 is 3, then find the value of k.
thnx for said thanks for my ans...​

Answer 1

$\textbf{Given:}$

$\textsf{Sum of zeroes of}\;\mathsf{3x^2-kx+6\;is\;3}$

$\textbf{To find:}$

$\textsf{The value of k}$

$\textbf{Solution:}$

$\textsf{Concept\;used:}$

$\boxed{\mathsf{Sum\;of\;zeroes\;of\;ax^2+bx+c\;is\;\dfrac{-b}{a}}}$

$\mathsf{Sum\;of\;zeroes=3}$

$\implies\mathsf{\dfrac{-(-k)}{3}=3}$

$\implies\mathsf{\dfrac{k}{3}=3}$

$\implies\boxed{\mathsf{k=9}}$

$\textbf{Find more:}$

Sum of the zeroes of the polynomial p(x) is x2-kx-9 is 7.find the value of k​

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