Okay, in Algebra II class, we've been learning about radicals. I'm generally pretty good at simplifying them, but there's one type of problem in particular that I guess just didn't register in my brain correctly. It looks something like this:
4√5
------
4√15
(The dotted line is suppose to represent the fraction line.)
These are the first couple of steps that I think I remember learning.
4√5 √15 4√75
------ • ------ = -------
4√15 √15 4
And I'm not completely positive that is right, but it seems to be what I remember. And after that, the 4's cancel out and you just take the square root of 75 like normal. Honestly, though, I feel as though it's wrong. I have a test on this stuff tomorrow and I really need to know how to do it! Thanks for your time.
4√5
------
4√15
(The dotted line is suppose to represent the fraction line.)
These are the first couple of steps that I think I remember learning.
4√5 √15 4√75
------ • ------ = -------
4√15 √15 4
And I'm not completely positive that is right, but it seems to be what I remember. And after that, the 4's cancel out and you just take the square root of 75 like normal. Honestly, though, I feel as though it's wrong. I have a test on this stuff tomorrow and I really need to know how to do it! Thanks for your time.