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

##### 1 Answer

Jun 27, 2018

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