Multiplication of two matrices possible if the number of columns in the
\first matrix equals the number of rows in the second matrix.
\\
The dimensions of the matrix A are
and the number of columns in
the matrix A is 5.
\The dimensions of the matrix B are
and the number of the rows in the matrix B is 5.
The number of columns in the matrix A equals the number of rows in the matrix B.
\So, matrix product AB is possible. Its dimensions are
. \ \

The matrix product AB is defined and matrix AB dimensions are
.