Предмет: Алгебра, автор: sofasim

25 баллов!!!! спасибо!!!

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Ответы

Автор ответа: lyonakopernic
1

1) =a+b*2a/(a-b)(a+b)= 2a/a-b

2*2/2-(-2)=4/4=1

сейчас второе напишу

2) =(4b(a-b)*a^3+1)/(a(a^3+1)*5(a-b)) +20= 4b/5a +20

4*(-4)/5*5 +20=19 9/25

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