Instructional Video
Khan Academy

Khan Academy: Linear Algebra: Exploring the Solution Set of Ax=b

9th - 10th
Video first graphs the transformation image of a specific transformation. Then examines the solution set for a couple particular points in the image. Shows that the solution set is a shifted version of the null space. [16:34]
Instructional Video
Khan Academy

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

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...