What this chapter is
A matrix is a rectangular array of numbers. The first chapter is about how to write one, add one, and find a determinant for a square matrix.
The trap is mixing the order of the matrix with the order of the numbers inside it.
How to study it
- Write a 2 by 2 matrix in your own numbers.
- Name the rows and columns.
- Open the lesson and do the check.
The book stays with you.