{x^2+y^2=25
{2x^2+ y=6
{y=6-2x ^2
{ x^2+(6-2x^2) ^2=25
{x^2+36- 24x^2 +4x^4=25
{ 4x^4-23x^2+11=0
x=-/+ V(V353+23)/V8
y=-/+V353+1/4
{x^2+y^2=25
{2x^2+ y=6
{y=6-2x ^2
{ x^2+(6-2x^2) ^2=25
{x^2+36- 24x^2 +4x^4=25
{ 4x^4-23x^2+11=0
x=-/+ V(V353+23)/V8
y=-/+V353+1/4