Odpowiedź:
1. (2p - 5) + (4 - 8p) = 2p - 5 + 4 - 8p = -6p - 1
2. (5 - 7m) - (5m + 4) = 5 - 7m - 5m - 4 = -12m + 1
3. (3x + 2y) + (5y - 2x - 7) = 3x + 2y + 5y - 2x - 7 = x + 7y - 7
4. 3(2a + 7) = 6a + 21
5. -2(3 - 5x) = -6 + 10x
6. p(5p - 4) = 5p² - 4p
7. 2x(5 - 3x) = 10x - 6x²
Liczę na naj ^^