EX 3 ICT
LEARNING RESOURCE.
MATRIX
DEFINITION: A matrix is defined as an ordered rectangular array of numbers. They can be used to represent systems of linear equations, as will be explained below.
Here are a couple of examples of different types of matrices:
And a fully expanded m×n matrix A, would look like this:
... or in a more compact form: 
MATRIX
DEFINITION: A matrix is defined as an ordered rectangular array of numbers. They can be used to represent systems of linear equations, as will be explained below.
Here are a couple of examples of different types of matrices:
| Symmetric | Diagonal | Upper Triangular | Lower Triangular | Zero | Identity |
|---|---|---|---|---|---|
 |  |  |  |  |  |
... or in a more compact form: 
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