### Home > PC > Chapter 4 > Lesson 4.2.2 > Problem4-90

4-90.

Find perfect squares. Take their roots pulling them out.

$\sqrt{a^2b^4b}=ab^2\sqrt{b}$

Find perfect cubes and take out the cube roots of them.

Find perfect cubes and take out the cube roots of them.

Find perfect 5th powers and take out the 5th roots of them.