Rozwiąż układ równań
(x+1)2 -(y-2)2=x2-y2+9
(x-2)2-4(y-2)=x2+8
2x+2-2y+4=2x-2y+9
2x-4-4y+8=2x+8
2x-4y-2x=8-8+4
-4y=4 /-4
y=1
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(x+1)2 -(y-2)2=x2-y2+9
(x-2)2-4(y-2)=x2+8
2x+2-2y+4=2x-2y+9
2x-4-4y+8=2x+8
2x-4y-2x=8-8+4
-4y=4 /-4
y=1