(the jpeg is attached - have I done it right?)
Anyway, my initial thoughts are to square either side to get ride of the root sign, but that doesn't make things any easier.
Great ! It's better for some people because they can't view pictures from external websites
Quite !Anyway, my initial thoughts are to square either side to get ride of the root sign, but that doesn't make things any easier.
I think it's better to write firstly this way : $\displaystyle x-2 \le \sqrt{x^2-9}$ and then to square it
However, be careful with the domain, since $\displaystyle x^2-9$ has to be positive.
Your answer will be in the form of intervals. So you'll have to take the intersection of these intervals with the domain.