Which of the following is(are) NOT the square of a 3 x 3 matrix with real entries ?
[A] ![\left[\begin{array}{ccc}1&0&0\\0&1&0\\0&0&-1\end{array}\right]](https://tex.z-dn.net/?f=%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D1%26amp%3B0%26amp%3B0%5C%5C0%26amp%3B1%26amp%3B0%5C%5C0%26amp%3B0%26amp%3B-1%5Cend%7Barray%7D%5Cright%5D "\left[\begin{array}{ccc}1&0&0\\0&1&0\\0&0&-1\end{array}\right]")
[B] ![\left[\begin{array}{ccc}-1&0&0\\0&-1&0\\0&0&-1\end{array}\right]](https://tex.z-dn.net/?f=%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D-1%26amp%3B0%26amp%3B0%5C%5C0%26amp%3B-1%26amp%3B0%5C%5C0%26amp%3B0%26amp%3B-1%5Cend%7Barray%7D%5Cright%5D "\left[\begin{array}{ccc}-1&0&0\\0&-1&0\\0&0&-1\end{array}\right]")
[C] ![\left[\begin{array}{ccc}1&0&0\\0&1&0\\0&0&1\end{array}\right]](https://tex.z-dn.net/?f=%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D1%26amp%3B0%26amp%3B0%5C%5C0%26amp%3B1%26amp%3B0%5C%5C0%26amp%3B0%26amp%3B1%5Cend%7Barray%7D%5Cright%5D "\left[\begin{array}{ccc}1&0&0\\0&1&0\\0&0&1\end{array}\right]")
[D] ![\left[\begin{array}{ccc}1&0&0\\0&-1&0\\0&0&-1\end{array}\right]](https://tex.z-dn.net/?f=%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D1%26amp%3B0%26amp%3B0%5C%5C0%26amp%3B-1%26amp%3B0%5C%5C0%26amp%3B0%26amp%3B-1%5Cend%7Barray%7D%5Cright%5D "\left[\begin{array}{ccc}1&0&0\\0&-1&0\\0&0&-1\end{array}\right]")
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Answer:
the answer is D i think so...
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Answer:
sorry...don't know the answer
Explanation:
sorry
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