Algebra
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Boundless Algebra
Matrices
Algebra Textbooks Boundless Algebra Matrices
Algebra Textbooks Boundless Algebra
Algebra Textbooks
Algebra

Section 1

Introduction to Matrices

Book Version 13
By Boundless
Boundless Algebra
Algebra
by Boundless
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4 concepts
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What is a Matrix?

A matrix is a rectangular arrays of numbers, symbols, or expressions, arranged in rows and columns.

Addition and Subtraction; Scalar Multiplication

There are a number of operations that can be applied to modify matrices, such as matrix addition, subtraction, and scalar multiplication.

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Matrix Multiplication

When multiplying matrices, the elements of the rows in the first matrix are multiplied with corresponding columns in the second matrix.

The Identity Matrix

The identity matrix $[I]$ is defined so that $[A][I]=[I][A]=[A]$, i.e. it is the matrix version of multiplying a number by one.

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