1. Use Inverse Matrices to Solve 2 Variable Linear Systems
Notes 3.8 (Day 2)
Use Inverse Matrices to Solve 2 Variable Linear Systems

2. Using an inverse matrix to solve a linear system of equations:
Step 1: Make a 2 x 2 coefficient matrix (just like in Cramer’s Rule)
Step 2: Multiply the coefficient matrix by a 2 x 1 matrix,
Step 3: Set this expression equal to the 2 x 1 matrix of constants
Step 4: Find the inverse of the coefficient matrix and multiply both sides of the equation by the inverse
Step 5: The result should give you =
Step 6: Label the answer (x, y)

3. Use an inverse matrix to solve the linear system.

4. Use an inverse matrix to solve the linear system.

5. Use an inverse matrix to solve the linear system.

6. Homework: P