Matrices

Learn what matrices are and about their parts (coordinates and dimensions).

Learn about the three basic operations we can perform on a matrix without changing the solution set of the linear system it represents.
Quiz #1
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Learn how to use the matrix row operations in order to easily solve large systems of linear equations.

Learn how to multiply matrices by scalars (in the world of matrices, scalars are simply regular numbers). For example, multiply a 2X2 matrix by 3.

Learn about zero matrices and about how matrix addition, subtraction, and scalar multiplication are related to their corresponding operations with real numbers.
Quiz #2
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Learn what the determinant of a matrix is and how to find it for 2x2 matrices.
Quiz #3
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Learn what the inverse of a matrix is, and how to determine whether two matrices are inverses or whether a matrix is invertible.

Learn about a way to find the inverse of a matrix using its determinant and adjugates.

After you've learned how to find the inverse of a 2x2 matrix, gain some practice with it.

Learn how matrices can be used to describe real-world situations.
Practice test
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