Odpowiedzi

2010-01-11T17:35:17+01:00
A) 5 - (6a + 8)= 5 - 6a - 8 = -6a - 3 =
b) (x+ y) - (x - y) = x + y - x - y = 0
c) 3x - (5x- 9) = 3x - 5x + 9 = -2x + 9
d) (5m - 3) - (10m - 2) = 5m - 3 - 10m + 2 = - 5m - 1 =
e) 4ab - (- 2a - 3ab) - 9a = 4ab + 2a + 3ab - 9a = 7ab - 7a
f) - (7x² - 5x + 4) - (-4x) = - 7x² + 5x - 4 + 4x = -7x² + 9x - 4
2 5 2