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Let m and N be two 3x3 matrices such tha...

Let m and N be two 3x3 matrices such that MN=NM. Further if `M!=N^2` and `M^2=N^4` then which of the following are correct.

Text Solution

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`M!=N^2`
`M^2=N^4`
`M^2-N^4=0`
`M^2-(N^2)^2=0`
`(M-N^2)(M+N^2)=0`
`M-N^2!=0`
`M+N^2=0`
`|M+N^2|=0`
...
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