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Precalculus
»
H.
Matrices and Determinants
»
H.3.
The Inverse and Determinant of a Square Matrix
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Finding and Using the Inverse of a Matrix
Overview
Tell whether the two matrices are inverses
Find the inverse of the matrix by adjoining the identity matrix
Find the inverse of a 2 x 2 matrix using the inverse formula
Solve the system using an inverse matrix
Finding and Using the Determinant of a Matrix
Overview
Find the determinant of a 2 x 2 matrix
Solve the equation for x using the determinant
Find the minor of the matrix
Find the cofactor of the matrix
Find the determinant of a 3 x 3 matrix
Find the determinant of a 4 x 4 matrix
Finding and Using the Inverse of a Matrix — Find the inverse of the matrix by adjoining the identity matrix
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