## Geometry: Common Core (15th Edition)

$\sqrt{(7-a)^2+(2-b)^2}$ Substitute the given values for a and b. $\sqrt{(7-4)^2+(2-(-2))^2}$ Following the order of operations, work expressions in parentheses first. To subtract a negative number, add its opposite. $\sqrt{(3)^2+(4)^2}$ Solve exponents. =$\sqrt{9+16}$ Add. =$\sqrt{25}$ Find the square root. =$5$