Matrices

A matrix is an array of numbers.

To show a matrix's size, you put the rows x columns.

To add two matrices, just add the numbers in the matching positions.

The two matrices must the be same size.  They must have the same amount of columns and rows to match in size.

Transposing a matrix is when you swap the rows and columns.

A^t is the symbol for transposing.

Example 1

A=(2 -3)    B=(-1 -5)
     (-4 2)          (3 -2)

A. A^t= (2 -4)   B^t= (-1 3)
              (-3 2)            (-5 2)

B. A+B=(1 -8)
               (-7 0)