If A and B are partitioned into submatrices, for example,

Then AB can be expressed as

provided the sizes of the submatrices of A and B are such that the indicated operations can be performed. This method of multiplying partitioned matrices is called block multiplication. In each part, compute the product by block multiplication. Check your results by multiplying directly.

Transcribed Image Text:

Ai | A12 A2 A22 and BB Bi 2 2 1 42-53 15-13 2370 521