A) \[\frac{13}{25}\]
B) \[-\frac{25}{13}\]
C) \[\frac{5}{13}\]
D) \[\frac{25}{13}\]
Correct Answer: B
Solution :
Given, \[\left| \,\begin{matrix} 2+x & 3 & 4 \\ 1 & -1 & 2 \\ x & 1 & -5 \\ \end{matrix}\, \right|\,=0\] Þ \[(2+x)(5-2)-3(-5-2x)+4(1+x)=0\] Þ \[6+3x+15+6x+4+4x=0\] Þ \[13x=-25\Rightarrow x=-\frac{25}{13}\].You need to login to perform this action.
You will be redirected in
3 sec