The dimensions of a matrix give the number of rows and columns of the matrix in that order. Since matrix A has 2 rows and 3 columns, it is called a 2 × 3 matrix. If this is new to you, we …

Learn about the properties of matrix addition (like the commutative property) and how they relate to real number addition.

Sal defines what it means to add or subtract matrices. He shows a few examples and discusses some important properties of matrix addition and subtraction.

This topic covers: - Adding & subtracting matrices - Multiplying matrices by scalars - Multiplying matrices - Representing & solving linear systems with matrices - Matrix inverses - Matrix …

Practice your understanding of the process of adding or subtracting two matrices.

For example, matrices are often used in computer graphics to rotate, scale, and translate images and vectors. They can also be used to solve equations that have multiple unknown variables …

Learn about the properties of matrix multiplication (like the distributive property) and how they relate to real number multiplication.

Solve equations where the unknown is a matrix, by using matrix addition and subtraction.

Learn about matrix notation, dimension, addition, and scalar multiplication. Optionally, learn the formula for matrix multiplication.

Sal discusses the conditions of matrix dimensions for which addition or multiplication are defined.