Question

How would you find A^-1 with a 3x3 matrix?

Answer 1

I know for a 2x2 it will look something like this

Answer 2

I suppose I could augument with the identity matrix

Answer 3

Mmmmm I don't think there is a nice little trick for 3x3.
Yah I think that's what you're supposed to do :[
Then turn the left side into the identity using elimination and stuff.
Tedious,

Answer 4

Yeah I will row rref tha matrix with he identity matrix

Answer 5

http://www.purplemath.com/modules/mtrxinvr.htm
I can show you the steps with an example but take a look at this link

Answer 6

And there is no shortcut like like zepdriz has stated above :(