Question

x^2+y^2=5
x^2-y^2=2 find all four solutions

Answer 1

x^2+y^2=5=x^2+y^2-5=0

Answer 2

x^2-y^2=2=x^2-y^2-2=0

Answer 3

add these two equations you get:

notice this gives you two x values but you will also get two y- values for a total of 4 points where these two graphs intersect.