{ (x+3)²+(y-1)²-2(2-y)=(y-3)²+(x-3)(x+3) { (2x-1)²-4y(x-¼y)=(2x-y)²-4(y+5)+1
{x²+6x+9+y²-2y+1-4+2y=y²-6y+9+x²-9
{4x²-4x+1-4yx+y²=4x²-4xy+y²-4y-20+1
{6x+9+1-4=-6y
{6x+6y=-6/:6
{-4x+4y=-20/:4
{x+y=-1
{-x+y=-5
--------------
2y=-6/:(-2)
y=-3
{y=-3
{x-3=-1
{x=2
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{ (x+3)²+(y-1)²-2(2-y)=(y-3)²+(x-3)(x+3)
{ (2x-1)²-4y(x-¼y)=(2x-y)²-4(y+5)+1
{x²+6x+9+y²-2y+1-4+2y=y²-6y+9+x²-9
{4x²-4x+1-4yx+y²=4x²-4xy+y²-4y-20+1
{6x+9+1-4=-6y
{4x²-4x+1-4yx+y²=4x²-4xy+y²-4y-20+1
{6x+6y=-6/:6
{-4x+4y=-20/:4
{x+y=-1
{-x+y=-5
--------------
2y=-6/:(-2)
y=-3
{x+y=-1
{y=-3
{x-3=-1
{y=-3
{x=2
{y=-3