Exercise 18 Page 632

We want to simplify a radical expression. To do so we will assume that x>0, otherwise the given expression would not be defined. - 3sqrt(14x^3)/- sqrt(21x) Let's recall the Multiplication Property of Square Roots and the Division Property of Square Roots. sqrt(ab)=sqrt(a) * sqrt(b), for a≥ 0,b≥ 0 sqrt(ab)= sqrt(a)sqrt(b),for a≥ 0,b>0 We can use these properties for our expression.

Now that we have simplified the factors as much as possible, we can use the Commutative Property of Multiplication to simplify even further.