1)(а+b) (c-d)=
2)(x-6) (x-4)=
3)(a-3) (a+7)=
4)(11-c) (c+8)=
5)(d+13) (2d-1)=
Помогите пожалуйста

1) (a + b)(c – d) = a * c – a * d + b * c – b * d = ac – ad + bc – bd2) (x – 6)(x – 4) = x * x – 4x – 6x + 24 = x² – 10x + 243) (a – 3)(a + 7) = a * a + 7a – 3a – 21 = a² + 4a – 214) (11 – c)(c + 8) = 11 * c + 11 * 8 – c * c – 8c = 11c + 88 – c² – 8c = –c² + 3c + 885) (d + 13)(2d – 1) = d * 2d – d * 1 + 13 * 2d – 13 * 1 = = 2d² – d + 26d – 13 = 2d² + 25d – 13

Answered by fedorsolovyev | 2025-08-26