The roots of the equation \[\left| \,\begin{matrix} 1 & 4 & 20 \\ 1 & -2 & 5 \\ 1 & 2x & 5{{x}^{2}} \\ \end{matrix}\, \right|=0\]are [IIT 1987; MP PET 2002]

The roots of the equation \[\left| \,\begin{matrix} 1 & 4 & 20

1.	The roots of the equation \[\left\| \,\begin{matrix} 1 & 4 & 20 \\ 1 & -2 & 5 \\ 1 & 2x & 5{{x}^{2}} \\ \end{matrix}\, \right\|=0\]are [IIT 1987; MP PET 2002]
A.	\[-1,-2\]
B.	\[-1,\,2\]
C.	\[1,-2\]
D.	\[1,\,2\]
Answer» C. \[1,-2\]

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The roots of the equation \[\left| \,\begin{matrix} 1 & 4 & 20 \\ 1 & -2 & 5 \\ 1 & 2x & 5{{x}^{2}} \\ \end{matrix}\, \right|=0\]are [IIT 1987; MP PET 2002]

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