1) and
Using the definition of absolute value of x as a piecewise function, the intersects are -3 and 3.
But that can't be right....
2) and
This one I think i could do if I could get started. But I keep end up having to find the square root of 1/7, which I can't seem to figure out how to express as a fraction. Maybe just a may problem, but I don't know.