Ответ:
1) (2х+у)(у-2х)=у²-4х² Б
2) (у-2х)²=у²-4ху+4х² Г
3) (х+2у)²= х²+4ху+4у² Д
4) (2х+2у) = 4х²+8ху+4у² А
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Ответ:
1) (2х+у)(у-2х)=у²-4х² Б
2) (у-2х)²=у²-4ху+4х² Г
3) (х+2у)²= х²+4ху+4у² Д
4) (2х+2у) = 4х²+8ху+4у² А