Tim x, y

Tim x, y
biet
17 x² + 4y² - 2x + 4y +2=0
2
27 x² + xy + y² = 0
2
37 x²
x + 2y² + 2xy - 2x+2=0
4x² - 4x + 5 + y² + 24 =0
47
2
2
5 > x² + y² + z² = xy + y z + x z
2
67 x² + 2y² + 2x4 - 2y+1=0