Question

two matrices A and b are added if​

Answer 1

Two matrices may be added or subtracted only if they have the same dimension; that is, they must have the same number of rows and columns. Addition or subtraction is accomplished by adding or subtracting corresponding elements. For example, consider matrix A and matrix B.

Answer 2

Answer:

           

Two matrices may be added or subtracted only if they have the same dimension,  that is, they must have the equal number of rows and columns. Addition or subtraction is done by adding or subtracting the corresponding elements.

For example,

consider matrix A and matrix B.

addition:

$\left[\begin{array}{ccc}1&2&3\\4&5&6\\7&8&9\end{array}\right]$  +  $\left[\begin{array}{ccc}1&2&3\\1&2&3\\7&8&9\end{array}\right]$=$\left[\begin{array}{ccc}2&4&6\\5&7&9\\14&16&18\end{array}\right]$

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