Предмет: Алгебра, автор: Аноним

СРОЧНО 25 БАЛЛОВ ЗА ОДНО ЗАДАНИЕ

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Автор ответа: xfritchannel

1

Надеюсь почерк понятный

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xfritchannel: обращайся)

Аноним: Спасибо ❤️

Автор ответа: Universalka

1

$(\frac{a}{a^{2}-2a+1}-\frac{a+4}{a^{2}-1} ):\frac{a-2}{a^{2}-1}=(\frac{a}{(a-1)^{2}}-\frac{a+4}{(a-1)(a+1)})*\frac{(a-1)(a+1)}{a-2}=\frac{a^{2}+a-a^{2}-4a+a+4}{(a-1)^{2}(a+1)}*\frac{(a-1)(a+1)}{a-2}=\frac{4-2a}{(a-1)^{2}(a+1)}*\frac{(a-1)(a+1)}{a-2}=\frac{2(2-a)}{(a-1)(a-2)}=-\frac{2}{a-1}=\frac{2}{1-a}\\\\\frac{2}{1-a}=\frac{2}{1-a}$

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