Using elementary transformations, find the inverse of the matrix`[[2, 0,-1],[ 5, 1, 0],[ 0, 1 ,3]]`

Explanation

Let A=`[[2, 0,-1],[ 5, 1, 0],[ 0, 1 ,3]]`

`A=IA`

`[[2, 0,-1],[ 5, 1, 0],[ 0, 1 ,3]]``=``[[1,0,0],[0,1,0],[0,0,1]].A`

`Apply R _
2
​
↔R _
1`

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