1. Matrix Multiplication
Algebra II
Matrix Multiplication

2. Scalar Multiply the whole matrix by the same number 6 4 5 3 2
6(4) 6(5) 6(3) 6(2) =

3. 2𝑋 = 𝑥 =15 2 𝑥 =11 2 𝑥 =7 2 𝑥 =5 3 −2 2 −2

4. ∗ (7) (8) (7) (8)

5. Not all Matrices can be multiplied
3 𝑥 5 𝑎𝑛𝑑 5 𝑥 3 𝑌𝑒𝑠 3 𝑥 3 4 𝑥 2 𝑎𝑛𝑑 4 𝑥 2 𝑁𝑂

6. ∗

7. iRAT
− −3 −3 5 − − −1 −2 −3 2 −

8. Problems
Page 186 #2-36 even