Ответ:
= b/(a-b)-(a/(a^2+b^2))*((a^2+ab-ab+b^2)/(a-b))=b/(a-b)-(a/(a^2+b^2))*((a^2+b^2)/(a-b))=b/(a-b)-a/(a-b)=(b-a)/(a-b)=-1
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Ответ:
= b/(a-b)-(a/(a^2+b^2))*((a^2+ab-ab+b^2)/(a-b))=b/(a-b)-(a/(a^2+b^2))*((a^2+b^2)/(a-b))=b/(a-b)-a/(a-b)=(b-a)/(a-b)=-1