��.13.12 �� 9 �� (��)

�� #1

$�� 13.12. �� :1) {(x^2-5y^2=-1, 3xy+7y^2=1);2) {(x^2+xy-3y^2=-9, x^2-y^2-2xy=-7);3) {(3x^2-y^2=11, x^2+2xy-y^2=7);4) {(2x^2+3xy+y^2=3,...$

�� , �� 9 ��, ��-��:

13.12. �� :

1) {(x^2-5y^2=-1, 3xy+7y^2=1);

2) {(x^2+xy-3y^2=-9, x^2-y^2-2xy=-7);

3) {(3x^2-y^2=11, x^2+2xy-y^2=7);

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

*�� .

(�� )

(�� )

*�� , ��