Zadanie
a)
(4 - 2x) + (7x - 2) = 4 - 2x + 7x - 2 = 5x + 2
b)
2a + (3a - 2b) - (2a - 3b) = 2a + 3a - 2b - 2a + 3b = 3a + b
c)
-c - (- 3c² - 3c) + 5 = -c + 3c² + 3c + 5 = 3c² + 2c + 5
d)
5(a² - 3a) - 2a(- 8 - a) = 5a² - 15a + 16a + 2a² = 7a² + a
e)
3x - 9y + 123 =
f)
-5(4p - 2) - 30p - 55 = -20p + 10 - 30p - 55 = -50p - 45
g)
(3a + 8)·(2 + b) = 6a + 3ab + 16 + 8b
h)
(2x - 3)·(1 - 4x) = 2x - 8x² - 3 + 12x = -8x² + 14x - 3
