Teaching MPPSC Assistant Professor Mock Test Series 2025 Mathematics Matrices Operations on Matrices
If \(A=\left[\begin{array}{ccc} 0 & x & 16 \\ x & 5 & 7 \\ 0 & 9 & x \end{array}\right]\) is a singular matrix then x is equal to
1
-12
2
21
3
-144
4
144