Hello,

What is the product of the following two matrices? In my book, the answer is A, while I believe it is B because if c_{1 }= r_{2 }, then a product exists. However, this is not upheld in this given question because c_{1 }= 1, and r_{2}= 4.

Here is the problem:

The product of (-2 -1 5 9) (0 -5)

(3 -2)

(4 0)

(-7 1) is:

Answers~

A) (-37)

(21)

B) product is not defined

The other choices are irrelevant to my question.

Thank you for the help, it is greatly appreciated.