## Matrices

Improve your skills in the area of Matrices.

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Improve your skills in the area of Matrices.

- M1 Matrices: Introduction
A matrix is an array of numbers. This module discusses matrices, their order, row and column matrices, square matrices and the identity matrix.

- M2 Addition and subtraction of matrices
Matrices of the same shape (same number of rows and columns) may be added/subtracted by adding/subtracting the corresponding elements.

- M3 Matrix multiplication
To multiply two matrices A and B, the number of columns in A must equal the number of rows in B.

- M4 Determinant of a matrix
The determinant of a matrix can only be calculated for a square matrix and is used in many aspects of mathematics/engineering/physics.

- M5 Special Matrices
It is helpful to understand the definition of a number of different types of “special” matrices.

- M6 Systems of equations
Systems of linear equations may be solved using elementary row operations. This is sometimes called Gaussian elimination.

- M7 Types of Solutions
Systems of linear equations can have infinitely many solutions, no solution, or a unique solution.

- M8 Inverse of a 2x2 matrix
There is no division operation in matrix algebra. However, there is multiplication by the inverse.

- M9 Inverse of a 3x3 matrix
- M10 Eigenvalues and eigenvectors
Eigenvalues and eigenvectors are used to understand how buildings, structures and automobiles react in real life. They also provide insights into many mathematical areas.

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