# Chapter 3 - Determinants - 3.2 Determinants and Elementary Operations - 3.2 Exercises - Page 118: 8

Factor $2$ out of the first column.

#### Work Step by Step

$$\left|\begin{array}{ll}{4} & {1} \\ {2} & {8}\end{array}\right|=2\left|\begin{array}{ll}{2} & {1} \\ {1} & {8}\end{array}\right|.$$ Factor $2$ out of the first column.

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