Question 1132298
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According to the Vieta's theorem, the product of the roots is equal to the value of the constant term of a polynomial.


Since the number 3 is the root and since the constant term is 15, then the second root is  {{{15/3}}} = 5.


According to the Vieta's theorem, the sum of the roots is equal to the coefficient at x taken with the opposite sign.


Since the roots are 3 and 5, it implies that k = -(3+5) = -8.     <U>ANSWER</U>
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Solved.  &nbsp;&nbsp;The value of &nbsp;"k" &nbsp;is &nbsp;-8:  &nbsp;&nbsp;Option &nbsp;B).