September 2018 2 18 Report

Zapisz w jak najprostrzej postaci.

a) (x-2)-(2-x)

b) (a+b)+(2a-b)-(a-2b)

c) (3x-y+1)-(x+y)+(y-x)

d) -(2a²-3ab)-(2b-3a²)+(-ab-b)


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