October 2018 1 31 Report

1. Zapisz w jaknajprostszej postaci :

a) 2a +7b - 5c + 4b - 5c + 3a

b) 2 (5a + 4b ) - (4a - 2b + 9 ) + (2a - 7 )

2.Wyłącz wspólny czynnik przed nawias :

a) 20a - 30b + 10c

b) 40ab + 2abc - 8ac


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