Instructional Video
Khan Academy

Khan Academy: Linear Algebra: Eigenvectors and Eigenspaces for a 3x3 Matrix

For Students 9th - 10th Standards
Video finding the eigenspace for the two eigenvalues for the specific 3x3 matrix from the previous video. Part of the process of solving requires finding a null space by getting a matrix into reduced row echelon form. The resulting two...
Instructional Video
Khan Academy

Khan Academy: Linear Algebra: Finding Eigenvectors and Eigenspaces Example

For Students 9th - 10th
Video defining eigenspace as the set of all the eigenvectors of a matrix with a specific eigenvalue. Finds the eigenspace for the two eigenvalues found in the previous video. Part of the process of solving requires finding a null space...
Instructional Video
Khan Academy

Khan Academy: Linear Algebra: Null Space 3: Relation to Linear Independence

For Students 9th - 10th
Video reviews what the null space of a matrix is and how to calculate it, then relates it to linear independence. Shows that if the vectors are linearly independent then the null space is the zero vector. Also shows that if the null...
Instructional Video
Khan Academy

Khan Academy: Linear Algebra: Dimension of the Column Space or Rank

For Students 9th - 10th
Video shows how to find the basis and dimension of the column space by finding its reduced row echelon form and using the columns corresponding to the pivot columns as the basis. Explains that rank is the dimension of the column space....
Instructional Video
Khan Academy

Khan Academy: Linear Algebra: Matrix Condition for One to One Trans

For Students 9th - 10th
Video first reviews what the null space is and how to solve for it using reduced row echelon form. Shows that any solution to the inhomogeneous system Ax = b will be the sum of a particular solution and a homogeneous solution. Extends...
Instructional Video
Khan Academy

Khan Academy: Linear Algebra: Visualizing a Column Space as a Plane in R3

For Students 9th - 10th
Video reviews how to find a basis for the column space and talks about how to find it more efficiently using reduced row echelon form. Shows a visualization of the column space in R3 as a plane. Shows two methods to determine the...
Instructional Video
Khan Academy

Khan Academy: Linear Algebra: Simplifying Conditions for Invertibility

For Students 9th - 10th Standards
A video lesson explaining that a transformation matrix is invertible if and only if it is a square identity matrix in reduced row echelon form. This video is also found in the strand Algebra: Matrices. [6:37]
Instructional Video
Khan Academy

Khan Academy: Linear Algebra: Inverting Matrices (Part 3)

For Students 9th - 10th Standards
Video shows how to determine the inverse of a 3 by 3 matrix using the Gauss-Jordan elimination method. This video also appears in the strand Algebra: Matrices. [13:35]
Instructional Video
Khan Academy

Khan Academy: Linear Algebra: Null Space 3: Relation to Linear Independence

For Students 9th - 10th
Video reviews what the null space of a matrix is and how to calculate it, then relates it to linear independence. Shows that if the vectors are linearly independent then the null space is the zero vector. Also shows that if the null...
Instructional Video
Khan Academy

Khan Academy: Linear Algebra: Dimension of the Column Space or Rank

For Students 9th - 10th
Video shows how to find the basis and dimension of the column space by finding its reduced row echelon form and using the columns corresponding to the pivot columns as the basis. Explains that rank is the dimension of the column space....
Instructional Video
Khan Academy

Khan Academy: Linear Algebra: Visualizing a Column Space as a Plane in R3

For Students 9th - 10th
Video reviews how to find a basis for the column space and talks about how to find it more efficiently using reduced row echelon form. Shows a visualization of the column space in R3 as a plane. Shows two methods to determine the...
Instructional Video
Khan Academy

Khan Academy: Linear Algebra: Visualizing a Column Space as a Plane in R3

For Students 9th - 10th
Video reviews how to find a basis for the column space and talks about how to find it more efficiently using reduced row echelon form. Shows a visualization of the column space in R3 as a plane. Shows two methods to determine the...
Instructional Video
Khan Academy

Khan Academy: Simplifying Conditions for Invertibility

For Students 9th - 10th Standards
A video lesson explaining that a transformation matrix is invertible if and only if it is a square identity matrix in reduced row echelon form.
Instructional Video
Khan Academy

Khan Academy: Linear Algebra: Simpler 4x4 Determinant

For Students 9th - 10th Standards
Video demonstrating how to find the determinant of a 4x4 matrix by using row operations and row replacements to get the matrix into upper triangular form. [9:13]
Activity
Math Medics

S.o.s. Math: Elementary Operations for Matrices

For Students 9th - 10th Standards
This lesson contains pertinent information regarding elementary operations for matrices. Step by step procedure makes completing the matrix easy.
Handout
Wolfram Research

Wolfram Mathworld: Gauss Jordan Elimination

For Students 9th - 10th
Mathworld provides a three step explanation of Gauss-Jordan elimination. To help you better understand the process, you can click on any of the highlighted terms for definitions.
Activity
Other

Uww: Gauss Jordan Method

For Students 9th - 10th
An explanation is provided regarding Gauss-Jordan method, along with a thorough example showing every step from the original system of equations to the final solution.
Unit Plan
Stefan Warner and Steven R. Costenoble

Finite Mathematics & Applied Calculus: Matrix Addition and Scalar Multiplication

For Students 9th - 10th Standards
Students learn about matrix addition and subtraction, and scalar multiplication. The tutorial consists of class notes, examples, and practice problems. Review exercises and a chapter quiz are included.
Handout
Math Notes and Math Tests

Pre Calculus Notes: Operations With Matrices [Pdf]

For Students 9th - 10th Standards
Students explore operations with matrices. Topics examined are matrix addition, scalar multiplication, matrix multiplication, and identity matrices. Class notes and examples are included.
Activity
Math Medics

S.o.s. Math: Gaussian Elimination

For Students 9th - 10th Standards
In this lesson, the Gaussian Elimination method is used to solve systems of linear equations. Provides several formulas and examples for understanding.
Handout
Stefan Warner and Steven R. Costenoble

Finite Mathematics & Applied Calculus: Graphing Calculator Pivoting Program

For Students 9th - 10th Standards
The calculator program allows learners to pivot on any entry in a matrix and perform simplification.

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