Evaluating 2 x 2 Determinants, Part 1
From Thinkwell's College Algebra Chapter 8 Matrices and Determinants, Subchapter 8.3 Determinants and Cramer's Rule

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Evaluating 2 x 2 Determinants, Part 2

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Using Cramer's Rule in a 3 x 3 Matrix

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Multiplying Matrices

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