# How do you simplify #(2sqrt(4x^2 + 36x + 81) + 3sqrt(9x^2 - 24xy + 16y^2))(2sqrt(x))#? Thanks in advance.

##### 1 Answer

Aug 14, 2016

#### Explanation:

At first glance it seems that we can't simplify. However, finding the prime factors under a root sign is always a good start.

Notice that,4, 81, 9 and 16 are all perfect squares.

The expressions under the square roots are both perfect squares.

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