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# finding the inverse of a 3x3 matrix Watch

1. hello ppl..
i am a newbie on this form...i need help with calculation of a 3 by 3 matrix...i find it quiet a tedious process and i m looking for a step by step process guide...need urgent help...i have an exam tomorrow...
2. (Original post by aisha gadit)
hello ppl..
i am a newbie on this form...i need help with calculation of a 3 by 3 matrix...i find it quiet a tedious process and i m looking for a step by step process guide...need urgent help...i have an exam tomorrow...
Or http://www.mathsisfun.com/algebra/ma...ss-jordan.html
3. There is no quick and simple way to find the inverse of 3x3 matrices. You have to remember the process and follow it through.
Page 75: http://filestore.aqa.org.uk/subjects...4-TEXTBOOK.PDF

Otherwise you can google some YT videos that get inverses using cofactors and that would reflect on what's in that book.
4. calculation of inverse of a 3 by 3 matric is itself a tedious process and there is no shortcut to it for sure...but if you do it step by step ..it gets quiet easier...i was also looking for a easier solution..so i found this video ..it explains the process in quiet a simpler way...hope it helps..
chk out this video
5. (Original post by aisha gadit)
hello ppl..
i am a newbie on this form...i need help with calculation of a 3 by 3 matrix...i find it quiet a tedious process and i m looking for a step by step process guide...need urgent help...i have an exam tomorrow...
determinant - D
matrix of minors - M
cofactor - C
then transpose that - CT

Then just 1/D * CT

Idk if that helps but as others have said its long and tedious and theres no getting around that, but i found at easier to just remember those 4 steps and know how to do 4 smaller steps rather than think of it as one big process. I mean I still remember that from 2 months ago very clearly.

Sorry if this doesnt help though, and good luck in your exam tomororw

Edit: 14 hours ago, im probably too late, idk why this came up on my sidebar

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