That makes it invertible Posted on 14 March 2013 by JohnHow can you know when a matrix is invertible? Here’s a video from a college friend of mine that answers the question.

Robert Talbert (@RobertTalbert) 15 March 2013 at 07:22 So THIS is how Matt DeLong is spending his sabbatical from Taylor.

makc 17 March 2013 at 08:54 It is not obvious at all why you need to calculate determinant. You could tell them to see if zero is on the line (2×2 case) or plane (3×3) formed by columns.

So THIS is how Matt DeLong is spending his sabbatical from Taylor.

It is not obvious at all why you need to calculate determinant. You could tell them to see if zero is on the line (2×2 case) or plane (3×3) formed by columns.