# How do you multiply ((5, -2, 1)) and ((1, 2))?

Jul 25, 2016

The Multiplication is not possible.

#### Explanation:

The First Matrix ${\left[A\right]}_{1 \times 3}$

The Second one ${\left[B\right]}_{1 \times 2}$

$\therefore$ the no. of columns of $\left[A\right] = 3 \ne 1 =$the no. of rows of $\left[B\right]$.

#:. Neither [A][B] nor [B][A] is possible.