For this case we have to, to add matrices, we must add term to term, that is:
Let:
[tex]C=\left[\begin{array}{cc}a&b\\c&d\\\end{array}\right][/tex] and [tex]D=\left[\begin{array}{cc}e&f\\g&h\\\end{array}\right][/tex]
We have to:
[tex]C+D=\left[\begin{array}{cc}a+e&b+f\\c+g&d+h\\\end{array}\right][/tex]
Then, solving the given exercise we have:
[tex]A+B=\left[\begin{array}{cccc}3+2&0+8&0+6&-1+3\\\end{array}\right][/tex]
Taking into account that different signs are retsn and the sign of the major is placed, we have:
[tex]A+B=\left[\begin{array}{cccc}5&10&6&2\\\end{array}\right][/tex]
Thus, [tex]A+B=\left[\begin{array}{cccc}5&10&6&2\\\end{array}\right][/tex]
Answer:
[tex]A+B=\left[\begin{array}{cccc}5&10&6&2\\\end{array}\right][/tex]
