1. Matrix Multiplication

2. Multiplying two matrices together is more com-plicated than adding or subtracting. In general,
The product of two matrices is found by multiplying _______and ___________.
ROWS
COLUMNS
Matrices can only be multiplied if the # of _________ in the 1st matrix =‘s the # of ______ in the 2nd matrix.
COLUMNS
ROWS

3. Ex. 1

4. Notice that the resulting matrix has dimensions _______.
A • B = C
2 x 3

5. Find the dimensions of each matrix product.
These numbers must match!!
These numbers don’t match!!
Not possible. Dimension mismatch.

6. Ex. 6 12 3 -6 9

7. Not possible!! Dimension mismatch.
Ex. 7
Not possible!! Dimension mismatch.