Matrices question

1. Apr 25, 2006

lakitu

hi there,

my teacher gave me the following question: 1. Evaluate AB

A= (19 81)
(2 10)

B= (9 -6)
(6 -7)

The book i have tells me how to add multiply and subtract matrices, i dont understand what evaluate AB means, is it multiply>?

Kind regards

lakitu

2. Apr 25, 2006

AKG

"Evaluate AB" means "Multiply A by B".

3. Apr 28, 2006

konartist

Whenever two letters are together like that it always means to multiply. AB = $$A \times B$$