Найдите значение выражения: 1) (2+3а)(5-а)-(2-3а)(5+а) при а = -1,5 2) (3а+в)^2- - №23710378

Найдите значение выражения:
1) (2+3а)(5-а)-(2-3а)(5+а) при а = -1,5
2) (3а+в)^2- (3а-в)^2 при а = -3 1/3; в=0,3
/ - это черта дроби
^ - это степень
- Предмет:
  Алгебра
- Автор:
  bebejames
- 6 лет назад

Ответы 1

в первом ответ -7.5Во втором -18/5 или -3 3/5
- Автор:
  abagail
- 6 лет назад
- 0
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