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If $3$ and $-6$ as the sum and product of its zeros respectively, then write the quadratic polynomial $f( x)$.
Given: $3$ and $-6$ as the sum and product of its zeros respectively.
To do: To write the quadratic polynomial $f( x)$.
Solution:
Let $\alpha$ and $\beta$ be the zeros of the quadratic polynomial, then
$( \alpha+\beta)=3$
$\alpha\beta=-6$
The required polynomial will be
$f( x)=x^2-( \alpha+\beta)x+\alpha\beta$
$f( x)=x^2-3x-6$
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