Question

2) (a + z)(n- m);
4)(c - d) (x - y);
6) (4-b) (5 + c);
8) (k - 6) (7-d).​

Answer 1

Ответ:

2).an-am+zn-zm

4). cx-cy-dx+dy

6). 20+4c-5b-bc

8).7k-kd-42+6d

Answer 2

$(a + z)(n - m) = an - am + zn - zm \\ (c - d)(x - y) = cx - cy - dx + dy \\ (4 - b)(5 + c) = 20 + 4c - 5b - bc \\ (k - 6)(7 - d) = 7k - dk - 42 + 6d$