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$�� 12.10. �� :1) {(3x^2+xy-2x+y-5=0, 2x^2-xy-3x-y-5=0);2) {(x^2+4xy=5, y^2-2xy=-1);3) {(x^2+y^2+xy=12, 4x+3xy-x^2=16);4) {(x^2-(2/3)y+1/9=0,...$

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12.10. �� :

1) {(3x^2+xy-2x+y-5=0, 2x^2-xy-3x-y-5=0);

2) {(x^2+4xy=5, y^2-2xy=-1);

3) {(x^2+y^2+xy=12, 4x+3xy-x^2=16);

4) {(x^2-(2/3)y+1/9=0, y^2-(2/3)x+1/9=0).

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