A Matrix is an array of numbers: A Matrix (This one has 2 Rows and 3 Columns). To multiply a matrix by a single number, we multiply it by every...

Example: a matrix with 3 rows and 5 columns can be added to another matrix of 3 rows and 5 columns. But it could not be added to a matrix with 3 rows and 4 columns (the columns don't …

Enter your matrix in the cells below "A" or "B". Or you can type in the big output area and press "to A" or "to B" (the calculator will try its best to interpret your data).

When we multiply a matrix by its inverse we get the Identity Matrix (which is like "1" for matrices):

We went on to solve it using "elimination", but we can also solve it using Matrices! Using Matrices makes life easier because we can use a computer program (such as the Matrix Calculator) to …

The pattern continues for larger matrices: multiply a by the determinant of the matrix that is not in a 's row or column, continue like this across the whole row, but remember the + − + − pattern.

Scalars, Vectors and Matrices And when we include matrices we get this interesting pattern: A scalar is a number, like 3, -5, 0.368, etc, A vector is a list of numbers (can be in a row or …

Introduction to Matrices Types of Matrix How to Multiply Matrices Determinant of a Matrix Inverse of a Matrix: Using Elementary Row Operations (Gauss-Jordan) Using Minors, Cofactors and …

Multiplying Complex Numbers The Complex Plane Common Number Sets Inequalities "Equal To" is nice but not always available. Maybe we only know that something is less than, or greater …

A vector has magnitude (how long it is) and direction ... Here are two vectors