The augmented matrix can be input into the calculator which will convert it to reduced row-echelon form. To solve a system of equations using a TI-83 or TI-84 graphing calculator, the system of equations needs to be placed into an augmented matrix. How do you find the identity matrix on a TI-84? When dealing with matrices, using the key will calculate the inverse of the matrix. To enter the multiplicative inverse of a number, enter the number and press. The inverse function is located in the fifth row of the left column on the calculator. To find the inverse matrix, go to MATRIX then press the number of your matrix and the u22121 button.

The inverse of a 3×3 matrix, say A, is a matrix of the same order denoted by A-1 where AA-1 A-1A I, where I is the identity matrix of order 3×3. How do you find the inverse of a 3×3 matrix?

Step 3: Find the adjoint by taking the transpose of the matrix of cofactors.

Step 2: Then find the matrix of cofactors.

Step 1: Find the matrix of minors for the given matrix.

Next, transpose the matrix by rewriting the first row as the first column, the middle row as the middle column, and the third row as the third column. If the determinant is 0, the matrix has no inverse. To find the inverse of a 3×3 matrix, first calculate the determinant of the matrix.

Input the values for the elements of the matrix pressing after each entry.

Input the dimensions of the matrix (2 2 ).

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Matrix inverse symbolic calculator