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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 Answer

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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 $= 3*3*3*3 = 81$
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U have not eliminated repetitions?
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Every combination will generate unique combination right ?
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yeah, I got it.. Thanks