Упростите:
а) -3(0,2х +0,4у)+(1,6х + 2,3у)2
б)2/7 (4 2/3m-1,4)-2/9(6m+ 2,7)
а) -3(0,2х +0,4у)+(1,6х + 2,3у)2
б)2/7 (4 2/3m-1,4)-2/9(6m+ 2,7)
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2/7(4 2/3m-1,4)-2/9(6m+2,7)=4/3m-2/5-4/3m-3/5=-1