Matrices and Matrix Operations · Example 2

ⓐ Add the two matrices $A=\left[\begin{array}{cc}a& b\\ c& d\end{array}\right]B=\left[\begin{array}{cc}e& f\\ g& h\end{array}\right]$
ⓑ Subtract the two matrices $A=\left[\begin{array}{cc}2& -4\\ 5& 3\end{array}\right]B=\left[\begin{array}{cc}6& 9\\ 7& 8\end{array}\right]$
ⓒ Multiply the matrix $A=\left[\begin{array}{cc}2& -4\\ 5& 3\end{array}\right]$ by 5.

OpenStax, Algebra and Trigonometry 2e · §11.5 Matrices and Matrix Operations · Example 2