Предмет: Алгебра, автор: RaffayKo

Решитеее очень надо
25 баллов!

Приложения:

Ответы

Автор ответа: Аноним
0
 frac{a}{a+c} - frac{2ac}{ a^{2}-c^{2} } + frac{c}{a-c} = frac{a(a-c)-2ac+c(a+c)}{a ^{2} -c ^{2} } = frac{a ^{2}-ac-2ac+ac+c ^{2} }{a ^{2}-c ^{2} } = \ frac{a ^{2}+c ^{2} -2ac}{a ^{2}-c ^{2} }  =  \ frac{(a-c)^{2}}{a^{2}-C^{2}} = frac{a-c}{a+c}  \
Автор ответа: Аноним
0
Обновите стр , если не очень понятно
Автор ответа: Пеппер
0
по-моему, это всё совершенно не так, может я неправ?
Автор ответа: Пеппер
0
упрощаем выражение
......................
Приложения:
Похожие вопросы
Предмет: Английский язык, автор: gazizovaalia
Пожалуйста, помогите (нужно вставить предлоги)
Fill in the prepositions using the text ‘At the Grocer’s’ for information:
If we cross … the road here we’ll be able to do … the shopping … the supermarket … there.
– Good morning, madam. What can I do … you. – I’d like half … a pound … butter, please.
You can buy some milk … the way … the butcher’s. When you get … the shop take a kilo … bacon.

Fill in the articles where necessary:
We’d like … pound of … pork and … bottle of … vinegar. We don’t keep … vinegar here at … butcher’s. You’d better go to … grocer’s.
– I am going to do … shopping as we need … cabbage, … tomatoes and … potatoes. – What about … fruit? – I think I should really buy … apples and … grapes.
– Would you like … anything? – I need half … pound of … meat. – Here you are. All … meat is fresh. I can offer you … excellent pork and … beef.
– There is … little sugar left. We need to buy some more at … supermarket. There is … confectionary department where I think they sell … sugar.
All … goods used to sell by … pound in … Great Britain but … system has changed. Most … measures are metric now.
I want to pay for … dress. I’ll pay with … hundred-pound note. Can you give … change? supermarket … there.
– Good morning, madam. What can I do … you. – I’d like half … a pound … butter, please.
You can buy some milk

Fill in the articles where necessary:
We’d like … pound of … pork and … bottle of … vinegar. We don’t keep … vinegar here at … butcher’s. You’d better go to … grocer’s.
– I am going to do … shopping as we need … cabbage, … tomatoes and … potatoes. – What about … fruit? – I think I should really buy … apples and … grapes.
– Would you like … anything? – I need half … pound of … meat. – Here you are. All … meat is fresh. I can offer you … excellent pork and … beef.
– There is … little sugar left. We need to buy some more at … supermarket. There is … confectionary department where I think they sell … sugar.
All … goods used to sell by … pound in … Great Britain but … system has changed. Most … measures are metric now.
I want to pay for … dress. I’ll pay with … hundred-pound note. Can you give … change?