## anonymous 3 years ago What is the simplest form of the expression? sqrt20+sqrt45-sqrt5

1. across

Try and find the prime-power decomposition of each number.

2. anonymous

idk what that is

3. anonymous

5?

4. across

That is, the number $$20$$ has prime-power decomposition $$2^2\cdot5$$.

5. across

The number $$45$$ has prime-power decomposition $$3^2\cdot5$$.

6. anonymous

i figured it out.. (: