Evaluate by Chio's method `[(1,0,2,2),(2,1,2,2),(2,4,5,1),(3,1,5,-1)]`

Find the value of x such that [(1,x,1)][(1, 3, 2),( 2, 5, 1), (15, 3, 2)][(1),( 2),(x)]=0

The cofactor of the element '4' in the determinant |(1,3,5,1),(2,3,4,2),(8,0,1,1),(0,2,1,1)| is

If A=[(1,-2,3),(4,5,-1),(5,0,2)] find 3A

Find the value of x, if [1x1][{:(1,3,2),(2,5,1),(15,3,2):}][{:(1),(2),(x):}]=0

Evaluate the following : [[1,2,-3],[-2,1,7]] [[2,3,1],[5,4,2],[1,6,3]]

If adj [(1,0,2),(-1,1,-2),(0,2,1)]=[(5,a,-2),(1,1,0),(-2,-2,b)] , then find a ,b

Evaluate the determinants (i) |(3,-1,-2),( 0, 0,-1),( 3,-5, 0)| (ii) |(3,-4, 5), (1, 1,-2),( 2, 3, 1)| (iii) |(0, 1, 2),(-1, 0,-3),(-2, 3, 0)| (iv) |(2,-1,-2),( 0, 2,-1),( 3,-5, 0)|

Evaluate the following : [[1,4,2],[5,-2,3]][[2,-4],[1,-3],[4, 0]]

Evaluate the following: ([(1,3),( -1,-4))]+[(3 ,-2 ),(-1 ,1)]) [(1 ,3,5),( 2 ,4 ,6)]

Find the value of x such that [1,x,1][[1,2,3],[4,5,6],[3,2,5]][[1],[-2],[3]]=O