# How do you normalize ( - 4 i - 5 j + 2 k )?

First: Lets calculate module $\sqrt{{\left(- 4\right)}^{2} + {\left(- 5\right)}^{2} + {2}^{2}} = \sqrt{45} = 3 \sqrt{5}$
Now, lets considered the vector $\left(- \frac{4}{3 \sqrt{5}} , - \frac{5}{3 \sqrt{5}} , \frac{2}{3 \sqrt{5}}\right)$. This vector has module =1