A viral video showing students at the Massachusetts Institute of Technology clapping for a math professor during his last lecture has social media in a stir, for good reasons, of course. Gilbert ...

Over the last few issues, we've been talking about the math entity called a matrix. I've given examples of how matrices are useful and how matrix algebra can simplify complicated problems. A messy ...

Solution: det (A) = −5, and for n×n matrix adj (A) has determinant (det A)^ (n−1). Here n = 3, so det (B) = (−5)^ (2) = 25.