Sophia Learning
Sophia: Using Determinants to Classify 3x3 Matrices: Lesson 2
This lesson demonstrates how the determinant of a 3x3 matrix can be used to tell whether or not the matrix represents a dependent linear system, an inconsistent linear system, or neither.
Sophia Learning
Sophia: Using Determinants to Classify 3x3 Matrices: Lesson 3
This lesson demonstrates how the determinant of a 3x3 matrix can be used to tell whether or not the matrix represents a dependent linear system, an inconsistent linear system, or neither.
Varsity Tutors
Varsity Tutors: Hotmath: Algebra Review: Determinant of a Matrix
Find a quick, concise explanation of how to find the determinant of a matrix. Several examples are given and clearly explained.
Interactive Mathematics
Interactive Mathematics: Determinants
Using determinants and Cramer's Rule, systems of two and three variables are solved step by step. Several examples are presented to demonstrate how Cramer's Rule is used.
Sophia Learning
Sophia: Using Determinants to Classify 2x2 Matrices: Lesson 2
This lesson demonstrates how the determinant of a 2x2 matrix can be used to tell whether or not the matrix represents a dependent linear system, an inconsistent linear system, or neither.
Purple Math
Purplemath: Determinant Word Problems
Matrix determinants can be used to solve many algebra and geometry word problems. Among them: finding the area of a triangle, finding the area of a parallelogram, and finding the equation of a line between two points. These three...
Purple Math
Purplemath: Determinants
A complete lesson on matrix determinants is offered here. From explanation of what a determinant is to how to find the determinant of a 2x2 or 3x3 matrix. Steps are written in and shown for the student or teacher's use. Also provided are...
Other
Meta Calculator: Matrix Calculator
Use this web-based matrix calculator to solve for functions and operations.
University of St. Andrews (UK)
University of St. Andrews: Matrices and Determinants
This resource explains determinants as related to mathematics and the history of determinants.