question_answer

If the zeroes of the quadratic polynomial \[{{\mathbf{x}}^{\mathbf{2}}}+\left( \mathbf{a}+\mathbf{3} \right)\,\,\mathbf{x}+\mathbf{b}\]are 3 and - 4, then

A)  \[a=2,\text{ }b=6\]                                                      

B) \[a=-\,2,\text{ }b=-12\]

C) \[a=3,\text{ }b=4\]                                                       

D) \[a=4,\text{ }b=-\,3\]

E)  None of these