# Chapter 3 Linear Systems and Matrices - 3.6 Multiplying Matrices - 3.6 Exercises - Skill Practice - Page 199: 11

\begin{bmatrix} -2 & 1 \\ -8 & 4 \end{bmatrix}

#### Work Step by Step

$$\begin{bmatrix} 1\\ 4 \end{bmatrix} \times \begin{bmatrix} -2 & 1 \end{bmatrix} = \begin{bmatrix} 1\times(-2) & 1\times1 \\ 4\times(-2) & 4\times1 \end{bmatrix} = \begin{bmatrix} -2 & 1 \\ -8 & 4 \end{bmatrix}$$

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