Question: Finding turning point, intersection of functions

Hi people, I have two questions and help on any of them would be greatly appreciated. 1. My first question is how would i find the point(s) where the two equations intersect? eg. 4*(x-1)^2+(y-2)^2 = 5; x^2+4*y^2 = 1; 2. My second question is how do i find the turning points of a function? eg. x*cos(x^2)/(1+x^2) Again any help is really appreciated. Thanks in advance.
Please Wait...