14-3

This week in advanced math we finished up chapter 14 and took a test and now we are currently working on chapter 12. Chapter 12 is about vectors but I am going to show you how to take the inverse of a matrix today. This is probably one of the easiest things to do when it comes to matricies. Here is how you find an inverse of a matrix.

1. First you are going to want to switch the first number of the matrix with the fourth number.
2. Then make the second and third numbers opposite of their sign.
3. Then cross multiply your origional matrix and find the determinate.
4. Take your determinate and multiply it by your second matrix.

EXAMPLE:
1. [2 3
1 4]

[4 -3
-1 2]

(4x2-1x3)= 5

1/5[4 -3
-1 2]

[4/5 -3/5
-1/5 2/5] This is your answer.

This is the easiest way to do this just follow the steps and you should be fine.