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evaluate| [1,x,y],[1,x+y,y],[1,x,x+y] |

Answer»

SOLUTION :GIVEN DETERMINANT `|[1,X,y,],[0,y,0],[0,0,x]|` (by `R_2 rarr R_2-R_1` and `R_3rarrR_3-R_1`)
`=1xxyxx x=xy`


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