kimblack Group Title What is the simplest form of the expression? sqrt20+sqrt45-sqrt5 one year ago one year ago

1. across Group Title

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

2. kimblack Group Title

idk what that is

3. kimblack Group Title

5?

4. across Group Title

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

5. across Group Title

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

6. kimblack Group Title

i figured it out.. (: