Currently studying math, sorry if my english is bad.

I am Wu Zhong Lan.

I am 18 years old =)

I am puzzled with some questions.

Questions:

3 equations xy = 1 x^2 + y^2 = 1 x^2 + y^2 = 4

In surd form, show the 4 intersections of the last graphs with the first.

I am puzzled to where to start :S

Thank you =)