### Home > PC > Chapter 12 > Lesson 12.1.1 > Problem12-7

12-7.
1. Complete the following matrix computations. Homework Help ✎

1. Use the results of the pattern of parts (a) and (b) to find the product without computing.

2. Verify your result for part (c) by multiplication.

$\begin{bmatrix}1(2)+2(4)\\1(-1)+2(0)\end{bmatrix}$

If part (a) is 'AB', then part (b) is '(2A)B'. What is part (c)?