8.2 is all about outing a system of equations into matrices and solving. It's quite easily, especially when you use the Gauss-Jordan formula. But sometimes you will encounter a system with no solution as well as a system with an infinite number of solutions.
You can find out a system has no solution when one of the rows ends up with all zeroes. This means that zero will equal a number, which would not be true.
Finding a system with infinite solutions is just like finding an equation in terms of z. When this occurs, you will have an infinite number of solutions.
Your handwriting is so neat! haha. And your explanations are very clear, which helped me better understand the difference between these two systems. Thanks!
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