Question

Расскройте скобки (5a+8+9d)6+3 (4c-2-d

Answer 1

.....=30a+48+63d+12c - 6 - 3d=30a+60d+12c+42

Answer 2

5a+8+54d+12c-2-d=5a+20-54+12c=5a-34+12c