question_answer

Number of real roots of the equation \[\left| \begin{matrix}    {{x}^{2}}-12 & -18 & -5  \\    10 & {{x}^{2}}+2 & 1  \\    -2 & 12 & {{x}^{2}}  \\ \end{matrix} \right|=0\] is

Answer:

(2)