Algebra 2 Chapter 4-08 Extended Programming Example

I am posting this because a number of people have commented that they panicked when they saw problems in the text requiring solving for 4 or 5 variables. This programming lesson leads the student through the steps of creating a spreadsheet program that will solve up to 5 equations in 5 unknowns using a matrix row elimination method. The main lesson explains the reasoning behind the steps. A previous video goes through a 3 x 3 example. This exercise uses more powerful programming techniques to cut the amount of work, compared with the previous example, and ends up creating a useful tool that can be saved by the student and used later. The same process can be extended with reasonable effort to 10x10 or so. (If you create a 10x10 program you can use it for any number of variables up to 10 by filling in the unused cells with zeros except for the unused diagonal cells which must be non-zero, normally 1, but any non-zero number will work. If you do this you will learn the method VERY WELL in the process!) See http://mathwithoutborders.com. ... https://www.youtube.com/watch?v=k892j5IbLVU