okay, i seem to be pretty cool with the basics of rationalizing surds, just started doing a level maths, is going okay.

three questions, though, i keep trying to do and can't see where i'm going wrong, here they are.

don't know how to do the symbols so will just write it

********

square root of 6,

over

square root of six, plus square root of 3

i get 6 minus square root of 18,

over,

3

however, the book says ....

2 minus square root of 2,....

i really can't see how they got this, hopefully if its explained, i'll be able to do the other two.

thanks!