Algebra: Matrices, determinant, Cramer rule

This module is about matrices that are rectangular tables of numbers, like this: . Matrices, in many ways, act like numbers, as you can add, subtract, multiply and sometimes invert them. They play central role in algebra, in numerical methods, in advanced engineering calculations, and in physics.
Lessons under this topic discuss matrix operations and solution of systems of linear equations using Cramer's rule.
One very nice tool for playing with matrix arithmetic is my linear algebra workbench.

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