Exercise 7 Page 768

For the addition of matrices to be possible, they need to have the same dimensions. In the given exercise, both are $2\times 3$ matrices. This means they both have two rows and three columns. To add these matrices, we add the corresponding elements. Let's do it!

$\left[\begin{array}{ccc}5& 4& 3\\ 1& \text{-}2& 6\end{array}\right]+\left[\begin{array}{ccc}1& 1& 1\\ 1& 1& 1\end{array}\right]$

Add matrices

$\left[\begin{array}{ccc}5+1& 4+1& 3+1\\ 1+1& \text{-}2+1& 6+1\end{array}\right]$

AddTerms

Add terms

$\left[\begin{array}{ccc}6& 5& 4\\ 2& \text{-}1& 7\end{array}\right]$