If `| [ 1 , 2 , 0 ] , [ 2 , x , 0 ] , [ 1 , x , x ] | = 0 ` then find the value of x

1/8 -(2x)/4 + 1 = 0 , find the value of x

If [ [ 1 , 3 ] , [ 0 , 0] ] [ [ 2 ] , [ -1 ] ] = [ [ x ] , [ 0 ] ] , find the value of x

If ( x + 1 )( x + 4 ) - ( x -2 )( x - 1 ) = 0 , find the value of x

If x^2 - 3x +1=0, then the value of x +1/x is

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

If [(0,2,1),(-2,0,-2),(-1,x,0)] is a skew symmetric matrix then find the value of x.

If [(1,2,1)][(1,2,0),(2,0,1),(1,0,2)] [(0),(2),(x)] = 0 , then the value of x is