Question

How do you multiply `((-5, 4))` with `((5, 4, 3, 2))`?

Answer 1

When we do multiplication:
The number of columns of the 1st matrix must equal the number of rows of the 2nd matrix.

Explanation:

The provided sets cannot be multiplied.

The result will have the same number of rows as the 1st matrix, and the same number of columns as the 2nd matrix.
See:
https://www.mathsisfun.com/algebra/matrix-multiplying.html

And:
http://www.mathwarehouse.com/algebra/matrix/multiply-matrix.php