College Algebra: Inverses: 2x2 Matrices

http://www.mindbites.com/lesson/806 for full video.

http://www.mindbites.com/series/705 for a bundle of videos on Inverses & Matrices. For an even broader bundle of videos that cover Inverses & Matrices and Systems of Equations, check out http://www.mindbites.com/series/851 .

To search for topic-specific help in our library of 1000+ video products for Algebra, please refer to our Algebra category at: http://www.mindbites.com/category/19-algebra .

To check out our full College Algebra video course, with 250+ videos included, refer to: http://mindbites.com/series/853-college-algebra-full-course .

In this lesson, we will talk about finding the inverse of a matrix. You can only find the inverse of a matrix that is both square and non-singular. To start with, we will go through the formula for finding the inverse of a 2X2 square matrix. Then, we will apply the formula and walk through how to double-check that our answer is, indeed, the inverse of the 2X2 matrix we started with. To find the inverse, you will first find the determinant (or scalar) of the original 2X2 matrix and then take the reciprocal of the determinant multiplied across a manipulated form of the original matrix (which Professor Burger will walk you through).

For Professor Burger's lesson on finding inverses of 3X3 matrices, check out http://www.mindbites.com/lesson/807.

Taught by Professor Edward Burger, this lesson was selected from a broader, comprehensive course, College Algebra.

Category:

Education

Tags:

• inverses
• matrix
• matrices
• 2X2
• find
• algebra
• mindbites
• sat
• tutor
• prep
• math
• inverse
• formula
• equation
• twobytwo
• two-by-two

[doobiebotha]

Good try, but numbers are not 'people'. Numbers have no souls and are all going to hell.

[DNilysfm]

I like how he calls the numbers ''people''.

[thebigguy508]

asdadasdasdkljasjkd thank you so much

[domoxbagelsx27]

College Algebra? bitch I take this during freshman year and im currently in high school taking this as a freshman

[Franatho]

He kept calling "numbers" "people..."

[Hisharu]

@doobiebotha If he read your comment, he would definitely put a negative sign in front of you and any other people that agree.

[HeyItsWinner]

@doobiebotha lol wtf? funny comment though

[sano0311]

He is probably thinking that matrix can represent just about anything :)

[Testify88]

Thank You SIR!!

[PhuCatOfficial]

I had a test today on this section and I know I got this section of the test correct. Take that Frank! Haha.