DoYourMath.com Algebrator Manual For Your Algebra Problem Solver | Page 21

Using Algebrator

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You can fill in the entries by using either the mouse or the "TAB" key.

In order to make the cursor exit the matrix, press the

key.

Operations with matrices
You can add (or subtract) matrices of the same size by using the "+" (or "-")
signs.
You can also multiply a matrix by a scalar and multiply two matrices together. In
order to perform a matrix multiplication operation, you need to make certain that
the number of COLUMNS of the FIRST MATRIX is equal to the number of ROWS of
the SECOND MATRIX.

Finding the inverse of a matrix
In order to tell Algebrator that you wish to calculate the inverse of a certain
matrix, you simply add the "-1" exponent to the matrix. This can be accomplished
in two different ways:

First way:

1. Press the

button.

2. Enter the matrix whose inverse you want to find.
3. Fill all the entries of the matrix with the desired values.
4. Press the

key to make the cursor "leave" the matrix.

5. Press "^" - the cursor will be blinking "up" in the exponent area.

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