Ответы на вопрос:
9a+12b = 3(3а+4в)=3а+4в 3 3 45c-18d = 9(5с-2d)= 5с-2d 27d 27d 3d 5x-xy = x(5-y) = 5-y x x 6mn-4m = 2m(3n-2) = 3n-2 2 m 2m
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