докажите что (a^2-2)(a+1)-(a^2+1)(a-2)+3a=3a^2 - №18453101

докажите что (a^2-2)(a+1)-(a^2+1)(a-2)+3a=3a^2
- Предмет:
  Алгебра
- Автор:
  adriannaferguson
- 5 лет назад

Ответы 1

(a²-2)(a+1) -(a²+1)(a-2)+3a =a^3+a²-2a-2 -a^3+2a²-a+2 +3a =3a² -2a -a +3a =3a²3a² =3a² что и требовалось доказать
- Автор:
  baby bookk6o
- 5 лет назад
- 0
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