Solving Ax = 0, Pivot Variables, and Special Solutions -- Lecture 7. How to solve some situations of Ax = 0 and use elimination to get a matrix into reduced row echelon form.
Gilbert Strang, 18.06 Linear Algebra, Spring 2005. (Massachusetts Institute of Technology: MIT OpenCourseWare), http://ocw.mit.edu (Accessed November 16, 2008). License: Creative Commons BY-NC-SA.
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