Browse by Tags: matrices

In this unit we continue with our work on matrices. We describe how to calculate the determinant of a 2 x 2 matrix and introduce the condition for the existence of an inverse matrix. A formula for calculating the inverse of a 2 x 2 matrix is presented supported by examples. Some applications of matrices in the real-world are then given, including solving linear systems of algebraic equations, computer graphics, cryptography and the modelling of graphs and networks.