**Determinants**

## Determinants are defined only for square matrices. A matrix is an array of elements arranged in m rows and n columns. When the number of rows equals the number of columns (m=n), the array is called a square matrix. We will only trouble ourselves with the determinants of 2x2 and 3x3 matrices. The notation for the determinant of

Aisd(A) or |A| and is represented here:

A.6