Предмет: Алгебра, автор: sakiKura

Пожалуйста, помогите решить.
/ - дробная черта
I - разделение дробей (что бы понятнее было)

1. Выполните сложение дробей
I  a/a+4 I + I a/a-4 I

2. Упростите выражение
I 1 I +   I 2a-1/a(в квадрате)-2a+1 I - I a/a-1 I

Ответы

Автор ответа: Дилярочка12
0
№1
ответ: 2а
№2
0-1а
может быть №2 не правильно, но 1 должно быть верным.
Похожие вопросы
Предмет: Английский язык, автор: mirat77743
Вставьте правильную форму глагола (present simple vs present continuous):


This is Mrs White. She …………(be) a primary school teacher.
She ………………………(teach) English, Maths and Geography.
At the moment, she ……………………………(teach) Maths. She ……………………………(live) in London and …………………(be)

married to Georges, who is French. They ……………………………(have) three

children. They all …………………….(love) animals, but they
…………….(not have) any pets because they

……………………………(live) in an apartment. Mrs White ………….(speak) French as well as English, but she ……………………(not teach) it.




Mrs White’s niece Sophie ……………………………(stay) with the Whites for a
few days. Sophie ……………………………(live) and …………………………(study) in Liverpool, but she ………………………………(enjoy) her mid-term
break in London at the moment. She …………………………(plan) to do some
serious shopping and sightseeing.




Mrs White’s son Arnold ……………………………(not like) shopping, but he
…………....(love) hanging out with friends. They usually
……………………(go) to the local park where they ……………………(play)
football or basketball. Today, however, Arnold ……………………………….….(not play) football or basketball; he …………………….(skateboard).


Mr White …………………(work) for a multinational company. He …………………………(not work) today, however, because he …………………………….(not feel) well. He phoned in sick.