question_answer

Find the value of n such that the equation \[{{y}^{2}}-(3+n)\,y+({{n}^{2}}+4n+4)=0\] has real and equal roots.

A)  \[\left( 1\,\,and\,\,\frac{-\,7}{3} \right)\]               

B)  \[\left( 1\,\,and\,\,\,\frac{7}{3} \right)\]

C)  \[\left( -\,1\,\,and\,\,\,\frac{-\,7}{3} \right)\]

D)  \[\left( -\,1\,\,and\,\,\,\frac{7}{3} \right)\]

E)  None of these