Chapter 9 Quadratic Relations and Conic Sections - 9.5 Graph and Write Equations of Hyperbolas - 9.5 Exercises - Mixed Review - Page 648: 46

$$\begin{pmatrix}-2&12\\ -6&9\\ -40&24\end{pmatrix}$$

Subtracting the matrices by subtracting corresponding elements, we find: $$\begin{pmatrix}6-8&24-12\\ \left(-1\right)-5&3-\left(-6\right)\\ \left(-8\right)-32&15-\left(-9\right)\end{pmatrix} \\ \begin{pmatrix}-2&12\\ -6&9\\ -40&24\end{pmatrix}$$