Упростите выражение (a-3)^2-a(5a-6) и найдите его значение при а=-1/2 - №32024073

Упростите выражение (a-3)^2-a(5a-6) и найдите его значение при а=-1/2
- Предмет:
  Алгебра
- Автор:
  madison2
- 6 лет назад

Ответы 1

${(a - 3)}^{2} - a(5a - 6)$ ${a}^{2} - 6a + 9 - 5 {a}^{2} + 6a$ $- 4 {a}^{2} + 9$ $- 4 \times {( - \frac{1}{2} )}^{2} + 9$ $- 4a \times \frac{1}{4} + 9$ $- 1 + 9$ $8$ $OTBET:8.$
- Автор:
  beckettix0v
- 6 лет назад
- 0
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