2(а2+b2)-2a(a-b)+b(a-2b)=2a2+2b2-2a2+2ab+ba-2b2=2ab+ba=3ab
b=-3
a=1 2/3
3ab=3 х 1 2/3 х (-3)=5 х (-3)=-15
Ответ:-15
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2(а2+b2)-2a(a-b)+b(a-2b)=2a2+2b2-2a2+2ab+ba-2b2=2ab+ba=3ab
b=-3
a=1 2/3
3ab=3 х 1 2/3 х (-3)=5 х (-3)=-15
Ответ:-15