How do you simplify #sqrt45 + 2sqrt5# without a calculator?
Start at the beginning:
That means we can rewrite:
Now, if I have 3 of these things and I add 2 of the same thing, I obviously get 5 of the things. What things? Well, in this case the things are
When you do it all at once, it looks like this:
In many (most?) algebra classes, this is what we mean by "simplify".
If you also want to learn how to get an approximation for