# Chapter 10 - Radical Expressions and Equations - 10-2 Simplifying Radicals - Practice and Problem-Solving Exercises - Page 610: 10

15

#### Work Step by Step

$\sqrt {225}$$\longrightarrow factor out perfect squares =\sqrt {25\times9} \longrightarrowuse the multiplication property of squre roots =\sqrt {25}\times\sqrt 9$$\longrightarrow$simplify $=5\times3$$\longrightarrow$multiply $=15$

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