Question

If α and β are the zeros of x2 +5x +6,then the value of (α+β ) is----

Answer 1

As we know the sum of the roots of a quadratic equation is equal to the negation of the coefficient of the second term, divided by the leading coefficient. The product of the roots of a quadratic equation is equal to the constant term (the third term), divided by the leading coefficient.

∴ a+b=5 , ab=6

=>a+b−3ab=5−3×6=−13

Explanation:

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