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  

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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  

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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  

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