SYSTEMS OF EQUATIONS Cramer's Rule (Page 2 of 6)

Enter the size of the matrix, which is 3 rows by 3 columns. Then type in each entry (row by row) of the matrix and press ENTER. The cursor will automatically advance to the next position.

3 ENTER key. 3 ENTER key. (Size)
2 ENTER key. Negation key. 1 ENTER key. 2 ENTER key. (Row 1)
1 ENTER key. 2 ENTER key. Negation key. 3 ENTER key. (Row 2)
3 ENTER key. 11 ENTER key. Negation key. 12 ENTER key. (Row 3)		 Calculator screen image.

Next go to the Home screen to check the determinant of the coefficient matrix. If the determinant is nonzero we may continue with Cramer's Rule.

2nd QUIT key. CLEAR key.

MATRX key. Right arrow key. 1: menu selection. MATRX key. 1: menu selection. Right parenthesis key. ENTER key.

 Calculator screen image.
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