7. द्विघात बहुपद 3x2 - kx + 6 के शून्यकों का योग -1 है तो k का मान है : If the sum of the zeroes of quadratic polynomial 3x2 - kx + 6 is -1 then the value of k is : (a)3 (b)-3 (c)-9 (d) 9
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Sum of zeroes
alpha+ beta= ‐b/a
so.–b/a= –(–k)/3
‐1 ×3=k
so.k=– 3
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