Note: This chapter deals with sets of linear equations

A determinant of a square matrix is a real number. For a 1x1 it is the only entry. ... This tool is even more valuable when we look at a 4x4 or a 5x5 matrix and begin thinking about having to calculate the determinant for those systems. The process for using Cramer’s rule to find the solution to a system of 3 equations and 3 unknowns can be ... ................
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