Given $A=\begin{pmatrix}2&2\7&2\end{pmatrix}$ and $B=\begin{pmatrix}2&7\2&2\end{pmatrix}$, eva

Question

Given $A=\begin{pmatrix}2&2\7&2\end{pmatrix}$ and $B=\begin{pmatrix}2&7\2&2\end{pmatrix}$, evaluate $A+B$, $2A-B$.

Accepted Answer

(a) $\begin{pmatrix}4&9\9&4\end{pmatrix}$; (b) $\begin{pmatrix}2&-3\12&2\end{pmatrix}$.

Sec 3/4 E Math T15-Q16 - Addition, subtraction and scalar multiplication of matrices