Recent content by shuiki0306

I was wondering why this is correct. Actually, I solved problem in my exam (this style). But, I still cannot understand why A I change to I A' with row operation.

Hello. Nice to meet you. I have just enrolled. :) I knew how to solve and to find out inverse Matrix by using Gaussian elimination. However, I was wondering why AI -> IA' is satisfactory. In my university, I was just taught how to use but wasn't taught why it is satisfactory. Thank you for...