Chapter 9 - Roots and Radicals - 9.1 - Roots and Radicals - Problem Set 9.1 - Page 401: 79

$\approx4.1$

Using the properties of radicals, a rational approximation (to the nearest tenth) of the given expression, $ 4\sqrt{3}-2\sqrt{2} ,$ is \begin{array}{l}\require{cancel} \approx6.9-2.8 \\\\ \approx4.1 .\end{array}