For (1), there are 2 cases to consider.

when x>0 and x-5>0, this implies x>0 and x>5

When x<0 and x-5<0 , this implies x<0 and x<5

Take the intersection of the solutions.

(2) Draw the graph first.

We see that this graph intersects the x-axis at -2 and 2, the y-axis at 4

Now, for , for (Why? Think about the domain of a radical function)

Previously, y_1 intersects the y-axis at 4, now y_2 intersects at 2.

Put all these details together.