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Need a LIVE tutor to help answer a question? Check out the people at www.tutor.com/signup?AdDist=1&ExAdId=90fddaff-89aa-4a4f-91da-90841e168246&TDC_OfferCode=e2bf363b-0cb8-4635-98c3-2b5211d0847a&subject=math&grade=undefined for a FREE 30 minute session! Finding the Inverse of a 3 x 3 Matrix using Determinants and Cofactors - Example 1. Besides using row reduction, this is another way to find the inverse of a 3 x 3 matrix.
Patrick offers a series of 58 short lectures covering everything you need to know for elementary linear algebra. His lectures are well organized, and straight to the point. You will find it to be a great review for classes and exams.