Multiplying Matrices GSE Accelerated Pre-Calculus Keeper 2.

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Presentation transcript:

Multiplying Matrices GSE Accelerated Pre-Calculus Keeper 2

Objective – To multiply two matrices. Two matrices may be multiplied if the number of columns in the first matrix is equal to the number of rows in the second matrix. 2 x 4 4 x 2 These two numbers must be the same in order to multiply the matrices. Dimensions of Product 2 x 2

Describing Matrix Products

Examples For find each of the following. a) AB b) BA c) AC

Examples

In Class Assignment Check for Understanding State whether the product AB is defined. If so, give the dimension of AB. Find the product. If it is not defined, state the reason. Using the given matrices, evaluate the expression.