Упростите выражение : (9+2а)^2-(9-2a)^2 - №11905250

Упростите выражение : (9+2а)^2-(9-2a)^2
- Предмет:
  Алгебра
- Автор:
  karina57
- 5 лет назад

Ответы 1

81+36а+4а²-81+36а-4а²=72а
- Автор:
  lucas64
- 5 лет назад
- 0
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