SYSTEMS OF EQUATIONS Cramer's Rule (Page 5 of 6)

Compute the y-value of the solution, which is the determinant of matrix B divided by the determinant of matrix A (which is 25).

 2nd QUIT key. CLEAR key.

 MATRX key. [MATH] 1: menu selection. MATRX key. 2: menu selection. Right parenthesis key. Divide key. 25 ENTER key.

 Calculator screen image.

The y-coordinate of the solution is 2. To find z, make a new copy of matrix A into matrix B, then replace the third column of entries (coefficients of z) with the constant terms.

 MATRX key. 1: menu selection. STO key. MATRX key. 2: menu selection. ENTER key.

 MATRX key. [EDIT] 2: menu selection. Down arrow key. Down arrow key. Right arrow key.
 Right arrow key. Negation key. 8 Down arrow key. 9 Down arrow key. 43 ENTER key.

 Calculator screen image. Calculator screen image.
Copyright © 2010 Turner Educational Publishing
Go back to the previous page. Go to the next page. Go to the Table of Contents. Go to the Index page. Go to the Quiz page. Exit to the Home page.