Solve a linear system using matrices | MIT 18.02SC Multivariable Calculus, Fall 2010

Solve a linear system using matrices
Instructor: Christine Breiner
View the complete course: ocw.mit.edu/18-02SCF10
License: Creative Commons BY-NC-SA
More information at ocw.mit.edu/terms
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[@michaelbayerl1683]

Old video, but... THANK YOU! When I was learning vector/matrix algebra by hand in the 1980's, I always knew how to solve the problems but invariable made minor arithmetic errors. It's great to see a Maths instructor acknowledge this. Computers are SO much more reliable for simple repetitive tasks than humans.

[@LAnonHubbard]

Thanks Christine and MIT.

[@effortless35]

I wonder if that was the first take :)

[@crissthian]

What about if you had a 4x4 system? or nxn system? how do you solve it?

[@mmbendou23adc]

Use the Jordan-Gauss elimination, the easy way to solve the system 4x4, or even 10x10.
Form the augmented matrix , enter the matrix in MATLAB. and then use this simple code(rref(A)), where A is the augmented matrix....

[@aborgeshonorato]

Best 👍 Teacher. Thanks

[@samyyoussef8380]

for the minor matrix at min 4:00 you would better write the minor matrices themselves then calculate'em later

[@Likwidl]

Gaussian elimination is much easier

[@agakingkurdos]

Regel von Sarrus geht schneller ihr Keks bei 3x3 Matrizen