when do you and when do you not use FOIL for radical equations?
look at this video where the guy uses FOIL http://www.youtube.com/watch?v=LY8VBsLf-4M

and for equations like √x+8=√3x+8 you would not use FOIL
why is this?

Question

when do you and when do you not use FOIL for radical equations?
look at this video where the guy uses FOIL http://www.youtube.com/watch?v=LY8VBsLf-4M

and for equations like √x+8=√3x+8 you would not use FOIL
why is this?

slaaibak · Answer

FOIL is used when two brackets should be multiplied with each other. This is not the case here.  You would only need subtraction and division.

anonymous · Answer

you only need subtraction and division for what? are you saying that the guy shouldn't have used foil ?

anonymous · Answer

No, he is saying that you only need that for your expression.

anonymous · Answer

thanks i get it i guess i'm just really sleepy right now no duh