Matrices

 

    Well helloo :) my weekend has been going well so far in case you all were wondering. But anyways, this past week we learned about Matrices and we also began the aleks program on the computer. Other than that we pretty much reviewed because we had already learned about matrices in algebra 2. Matrices are pretty simple to work or solve but they are a bit tedious.

There are some rules for matrices:

When adding matrices, they must be of the same dimensions. The same goes for subtracting matrices.

Ex. A 2x3 matrices can only be added to a 2x3 matrices

When multiplying matrices, you can only multiply matrices that have the same colomns and rows.

Ex. 2x3* 3x1 the colomn of the first are equal to the rows of the second.

You cannot technically divide a matrices, to "divide" a matrices, you simply multiply by the inverse..

Ex. inverse

0 1

1 0 = 0-1=-1 = 1/-1* 0 1

1 0 = 0 -1

-1 0