Назад
ГДЗ Алгебра 7 клас Мерзляк (2024)
§ 1. Алгебраїчні вирази
Реклама:
Подайте у вигляді многочлена вираз:
1) (c – 2)(c + 2) = c2 – 22 = c2 – 4;
2) (12 – x)(12 + x) = 122 – x2 = 144 – x2;
3) (3x + y)(3x – y) = (3x)2 – y2 = 9x2 – y2;
4) (6x – 9)(6x + 9) = (6x)2 – 92 = 36x2 – 81;
5) (x + 7)(7 – x) = (7 + x)(7 – x) = 72 – x2 = 49 – x2;
6) (5a – 8b)(5a + 8b) = (5a)2 – (8b)2 = 25a2 – 64b2;
7) (8m + 2)(2 – 8m) = (2 + 8m)(2 – 8m) = 22 – (8m)2 = 4 – 64m2;
8) (13c – 14d)(14d + 13c) = (13c – 14d)(13c + 14d) = (13c)2 –(14d)2 = 169c2 – 196d2.
1) (c – 2)(c + 2) = c2 – 22 = c2 – 4;
2) (12 – x)(12 + x) = 122 – x2 = 144 – x2;
3) (3x + y)(3x – y) = (3x)2 – y2 = 9x2 – y2;
4) (6x – 9)(6x + 9) = (6x)2 – 92 = 36x2 – 81;
5) (x + 7)(7 – x) = (7 + x)(7 – x) = 72 – x2 = 49 – x2;
6) (5a – 8b)(5a + 8b) = (5a)2 – (8b)2 = 25a2 – 64b2;
7) (8m + 2)(2 – 8m) = (2 + 8m)(2 – 8m) = 22 – (8m)2 = 4 – 64m2;
8) (13c – 14d)(14d + 13c) = (13c – 14d)(13c + 14d) = (13c)2 –(14d)2 = 169c2 – 196d2.