If `|[1,2,x],[1,1,1],[2,1,-1]|=0"` then find x

If A=[[1,3,2],[-1,2,0],[0,-1,1]] , then find a matrix X such that A^(2)-2A-X=0

If |[1,x,x^2] , [x,x^2,1] , [x^2,1,x]|=3 then find the value of |[x^3-1, 0, x-x^4] , [0,x-x^4, x^3-1] , [x-x^4, x^3-1, 0]|

.If [[x-1,2,y-5],[z,0,2],[1,-1,1+a]]=[[1-x,2,-y],[2,0,2],[1,-1,1]] then find x,y,z,a

If |[x,2,0],[2,x,0],[0,0,1]|+|[y,1],[0,0]|+|[0,1],[0,z]|=0 ,then find x

If [[x, 4, 1]] [[2,-1,2] , [1,0,2] , [0,2,-4]] [[x], [4], [1]]=0 then find x

If [1,1,x][[1,0,2],[0,2,1],[2,1,0]][[1],[1],[1]]=O find x

A={:[(1,2,1),(3,-1,2),(1,0,3)]:},B={:[(1,1,1),(-1,1,1),(2,-2,2)]:} then find matrix X such that 2A+X=2B.

If [[x,4,1]][[2,1,2],[1,0,2],[0,2,-4]][[x],[4],[-1]]=0 Find x

[[x,4,1]][[2,1,21,0,20,2,-4]][[14-1]]=0, find x