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