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$�� 609. �� :�) {x^2-4y=-8, 3x^2+2y=18}; �) {2x^2+5x-3y=21, 5x^2-11x-9y=7};�) {3x+2y^2=9, 6x-3y^2=-45}; �) {4x-3y-5y^2=8,...$

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609. �� :

�) {x^2-4y=-8, 3x^2+2y=18}; �) {2x^2+5x-3y=21, 5x^2-11x-9y=7};

�) {3x+2y^2=9, 6x-3y^2=-45}; �) {4x-3y-5y^2=8, 2x-2y-3y^2=3}.

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