I have two limit questions:

a) lim x goes to 1 of ((square root (6-x) -2)/ (square root (10-x) -3))

b) lim x goes to 0 of (2x / (abs(3x-2) - abs(3x+2))

The first one I tried to multiply by both conjugates but it doesn't result in things canceling like it should. The second one I can't work out the intervals. I graphed it and see the limit is a negative third but I can't see that algebraically.