Question

Упростите выражение (5-6): 5. 3а(а-b)+b(2a-b) 6. 3c(c-2)-(c-2)2

Answer 1

5. 3a²-3ab+2ab-b²=3a²-ab-b²
6. 3c²-6c-2c-4=3c²-8c-4

Answer 2

1. (5-6): 5 simplifies to -1/5.

2. To simplify 3a(a-b) + b(2a-b), we can expand the terms: = 3a^2 - 3ab + 2ab - b^2 = 3a^2 - ab - b^2

3. To simplify 3c(c-2) - (c-2)^2, we can expand the terms: = 3c^2 - 6c - (c^2 - 4c + 4) = 3c^2 - 6c - c^2 + 4c - 4 = 2c^2 - 2c - 4