cum se rezolva legea de compozitie?
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2xy + 2x + 2y + 1 = 2xy + 2x + 2y + 2 - 1 = 2x(y + 1) + 2(y + 1) -1 = (2x + 2)(y + 1) -1 = 2(x + 1)(y + 1) - 1.
Green eyes.