SV# 5 Unit J Concept 3 - Matrices

          Hi guys, Sergio here. Something that the viewer definitely has to be careful with, are the signs in the matrices. If a mistake is made when putting in the signs (such as accidentally putting down a -7 instead of a +7, or putting a +1 instead of -1, then you will have some trouble. Small mistakes like these can easily lead you to an incorrect answer, which will in turn just make it much harder to find what you did wrong.