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The number of distinct possible square matrices of order 2, with each entry 2 (or) 0 (or) -2 is __________________
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+1 vote
Order 2 square matrix means 4 elements in a matrix like $\begin{bmatrix} x &x \\ x &x \end{bmatrix}$
now each $x$ can be $-2$ or $0$ or $2$ i.e. $3$ choice.
So total ways $= 3*3*3*3 = 81$