Chapter 9 - Section 9.1 - Solving Quadratic Equations by the Square Root Property - Exercise Set - Page 632: 52

$d=5 \text{ units} $

Using $d=\sqrt{(x_1-x_2)^2+(y_1-y_2)^2}$ or the Distance Formula, then the distance, $d$, between the given points $( 2,-2 )$ and $( 5,2 )$ is \begin{array}{l}\require{cancel} d=\sqrt{(2-5)^2+(-2-2)^2} \\\\ d=\sqrt{(-3)^2+(-4)^2} \\\\ d=\sqrt{9+16} \\\\ d=\sqrt{25} \\\\ d=\sqrt{(5)^2} \\\\ d=5 \text{ units} .\end{array}