<p>Okay, for those that have the Barrons Math II book, I have a question regarding problem 3 on page 145. I solved the problem five times and it seems to me that there is no right answer. I might be wrong of course, I've been solving matrices all day and my head is going to explode, but I consulted my answers with online calculators that subtract matrices and I keep getting the same answer, which is somewhat a mix between answers A) and B), but neither one of them really.</p>
<p>I guess I'm making a mistake somewhere and I would really appreciate if someone told me what the correct answer to this question is (I know there are answers on page 152, but I just can't agree with the explanation that is given there).</p>