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OSPINA EDUCAT ON
Inverse matrix
Inverse Matrix (A^-1) is an important tool in the mathematical world. It is used in solving a system of linear equations. Inverse matrices are frequently used to encrypt or decrypt message codes.
MATRIX 2X2
MATRIX 3X3
Follow these five steps:
1. Matrix of minors
2. Matrix of cofactors
3. Transpose
4. Determinant
5. Inverse matrix 3x3
Step 1. Matrix of minors
Step 2. Matrix of cofactors: This is easy! Just apply a "checkerboard" of minuses to the "Matrix of Minors". In other words, we need to change the sign of alternate cells, like this:
Step 3. Transpose: Now "Transpose" all elements of the previous matrix... Rows become columns or columns become rows.
Step 4. Determinant: It is 10
Step 5. Inverse Matrix:
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