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This precalculus video tutorial explains how to find the determinant of 3x3 matrices and 2x2 matrices.

Matrices - Free Formula Sheet:

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Introduction to Matrices:


Adding and Subtracting Matrices:


Scalar Multiplication of Matrices:


Solving Matrix Equations:


Multiplying Matrices:


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Gaussian Elimination & Row Echelon Form:


Gauss Jordan Elimination:


Gaussian Elimination With 4 Variables:


Inverse of a 2x2 Matrix:


Inverse of a 3x3 Matrix:


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Determinant of 2x2 and 3x3 Matrix:


Determinant of 4x4 Matrix:


Cramer's Rule - 2x2 Linear System:


Cramer's Rule - 3x3 Linear System:


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