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Inverse of a 2x2 Matrix

This precalculus video tutorial explains how to determine the inverse of a 2x2 matrix. It provides a simple formula to determine the multiplicative inverse of a matrix. You can check to see if you have the right answer by multiplying the matrix and its inverse to see if you get the multiplicative identity matrix I2. This video contains plenty of examples and practice problems. Introduction to Matrices:    • Intro to Matrices   Adding and Subtracting Matrices:    • Adding and Subtracting Matrices   Scalar Multiplication of Matrices:    • Scalar Multiplication of Matrices and...   Solving Matrix Equations:    • Solving Matrix Equations   Multiplying Matrices:    • Multiplying Matrices   __________________________________ Gaussian Elimination & Row Echelon Form:    • Gaussian Elimination & Row Echelon Form   Gauss Jordan Elimination:    • Gauss Jordan Elimination & Reduced Ro...   Gaussian Elimination With 4 Variables:    • Gaussian Elimination With 4 Variables...   Inverse of a 2x2 Matrix:    • Inverse of a 2x2 Matrix   Inverse of a 3x3 Matrix:    • Inverse of a 3x3 Matrix   __________________________________ Determinant of 2x2 and 3x3 Matrix:    • Determinant of 3x3 Matrices, 2x2 Matr...   Determinant of 4x4 Matrix:    • How To Find The Determinant of a 4x4 ...   Cramer's Rule - 2x2 Linear System:    • Cramer's Rule - 2x2 Linear System   Cramer's Rule - 3x3 Linear System:    • Cramer's Rule - 3x3 Linear System   ___________________________________ Final Exams and Video Playlists: https://www.video-tutor.net/ Full-Length Videos and Worksheets:   / collections