Using Cramer's Rule in a 3x3 Matrix (9.8.2)

Question 1

• Cramer’s rule states that determinants can be used to solve a system of linear equations so long as the number of variables is the same as the number of equations.

Answer 1

• Cramer’s rule states that determinants can be used to solve a system of linear equations so long as the number of variables is the same as the number of equations.

Question 2

• The solution for any variable, a, in a system of equations is the value of the determinant set up for it, Da, divided by the value of the determinant set up for all the coefficients, D.

Answer 2

• The solution for any variable, a, in a system of equations is the value of the determinant set up for it, Da, divided by the value of the determinant set up for all the coefficients, D.