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Find Is Nonsingular matrix [[1,2,3],[4,5,6],[7,8,9]]

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Your problem `->` Is Nonsingular matrix [[1,2,3],[4,5,6],[7,8,9]]


A square matrix `A`, such that `|A| != 0`, is called nonsingular matrix.


`A` = 
`1``2``3`
`4``5``6`
`7``8``9`


`|A|` = 
 `1`  `2`  `3` 
 `4`  `5`  `6` 
 `7`  `8`  `9` 


 =
 `1` × 
 `5`  `6` 
 `8`  `9` 
 `-2` × 
 `4`  `6` 
 `7`  `9` 
 `+3` × 
 `4`  `5` 
 `7`  `8` 


`=1 xx (5 × 9 - 6 × 8) -2 xx (4 × 9 - 6 × 7) +3 xx (4 × 8 - 5 × 7)`

`=1 xx (45 -48) -2 xx (36 -42) +3 xx (32 -35)`

`=1 xx (-3) -2 xx (-6) +3 xx (-3)`

`= -3 +12 -9`

`=0`


Here, `|A| = 0`, so `A` is a singular matrix






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