1. The problem statement, all variables and given/known data Solve this system of equations for x and y. v=x+y v^2=x^2+y^2 2. Relevant equations The quadratic formula: x = (-b +/- sqrt(b^2-4*a*c))/(2*a) 3. The attempt at a solution A TA gave the following advice: "Make y the subject of the first equation. Find y2 in terms of v and x using this equation. Substitute y2 in the second equation. You now have a quadratic equation in x and there will be two solutions" I know the answers are x=0 and y=v but I "can't get there from here." My most recent attempt I got as far as 2x^2-2vx=0. In this case, this homework is already solved so if someone could walk me through it I would be grateful.