��.12.13 �� 9 �� (��)

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$�� 12.13. �� :1) {(x^2 y^5=1, x^5 y^2=-1); 2) {((x-y)^2 (x+2y)=4, (x-y)^4 (x+2y)^5=16);3) {(x^3 y+x^2 y^2=6, x^2 y^2=xy^3=12);4)...$

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12.13. �� :

1) {(x^2 y^5=1, x^5 y^2=-1);

2) {((x-y)^2 (x+2y)=4, (x-y)^4 (x+2y)^5=16);

3) {(x^3 y+x^2 y^2=6, x^2 y^2=xy^3=12);

4) {(2xy+6x-y^2-3y=14, 2x^2+4x-xy-2y=35);

5) {(x^2+4xy+3y^2-x-3y=24, 2x^2+xy-y^2-2x+y=6);

6) {(x^3/y+xy=40, y^3/x+xy=10).

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