This Tutorial will Show you How to Find the Determinant and Inverse of a 3x3 Matrix The 3x3 Means 3 Columns & 3 Rows .

Remove First Row First Column ( Red Line ) You will be left with a 2-by-2 matrix Do a Simple Cross Multiplication but don't forget to put a Minus sign While Doing a Cross Multiplication.

(1x11) - (8x6) = (11-48)= -37 and at the End we got 5 so we called at the Determinant of That 3x3 Matrix .

Repeat the procedure above but do it for all the entries one by one and here + or - sign assigned to it in alternating fashion

Step 2 is to Take Transpose : reflecting the entries along the main diagonal ..

Divide All numbers of the Matrix / Determinant Value 5

**How To Find The Determinant of a 3x3 Matrix :**Remove First Row First Column ( Red Line ) You will be left with a 2-by-2 matrix Do a Simple Cross Multiplication but don't forget to put a Minus sign While Doing a Cross Multiplication.

(1x11) - (8x6) = (11-48)= -37 and at the End we got 5 so we called at the Determinant of That 3x3 Matrix .

**How To Find The Inverse of a 3x3 Matrix :**Repeat the procedure above but do it for all the entries one by one and here + or - sign assigned to it in alternating fashion

Step 2 is to Take Transpose : reflecting the entries along the main diagonal ..

Divide All numbers of the Matrix / Determinant Value 5

How to Find the Determinant and Inverse of a 3x3 Matrix
Reviewed by Abid Jamal
on
March 12, 2015
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