Предмет: Алгебра, автор: maxzilvova

помогите сделать 74, 76 и 78 а то очень непонятно

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Автор ответа: tabarc

4а2-6а+в2-4ав+3в=(2а-в)2-3(2а-в)=81-3*9=54
(m+k)^4= (m+k)^2*(m+k)^2= (m2+k2+2mk)(m2+k2+2mk)=(29-2*10)(29-2*10)=81
49/100

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