Q.

which of the following is not the square of a 3X3 Matrix with real entries?

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a

1000−1000−1

b

−10001000−1

c

−1000−1000−1

d

100010001

answer is C.

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Detailed Solution

For a matrix to be square of other matrix its determinant should be positive.
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which of the following is not the square of a 3X3 Matrix with real entries?