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1. -(2x - 1) - (3x + 1)= -2x+1-3x-1= -5x
2. (4a - 7b) - (2a + 3b)= 4a-7b-2a-3b=2a-10b
3. (2p - r) + (2r - p)= 2p-r+2r-p= p+r
4. (x + y) + (x - z) + (z - y)= x+y+x-z+z-y=2x
zad2
-(2a² - 3ab) - (2b - 3a²) + (-ab - b)= -2a²+3ab-2b+3a²-ab-b= a²+2ab-3b
2. (4a - 7b) - (2a + 3b) = 4a-7b-2a-3b = 2a - 10b
3. (2p - r) + (2r - p) = 2p -r + 2r - p= p+r
4. (x + y) + (x - z) + (z - y)= x+y +x-z +z-y= 2x
Zad.2 Zapisz w jak najprostszej postaci.
-(2a² - 3ab) - (2b - 3a²) + (-ab - b) =
= -2a2 +3ab – 2b+3a2 – ab-b=
= a2 + 2ab – 3b
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