My determinant code isn't working

[Ama Kwaah]

i have been trying to get the correct code for a 3x3 matrix and upon checking for information from the net, i realised it was almost like my code..i mean the logic was the same but when i run it, i get a random negative number which is far from the answer.
Below is the code snippet for that portion:

double determinant =(x[0][0]*x[1][1]*x[2][2]) + (x[0][1]*x[1][2]*x[2][0]) + (x[0][2]*x[1][0]*x[2][1]) - 
(x[0][0]*x[1][2]*x[2][1]) - (x[0][1]*x[1][0]*x[2][2]) -
       (x[0][2]*x[1][1]*x[2][0]);
 

i hope i can get help from here

[weaknessforcats]

Your calculation looks OK but you don't show your matrix.

A random negative value usually means uninitialized variables.