September 2018 1 11 Report

kto rozwiąze mi proporcje? bardzo ważne ;) prosze o pomoc

A= ½ a²-3ab+b-4

B=2a+5ab-4b

C=2,5a²-4a-5b

oblicz; a) A+B+C

b) A-(B+C)

c) (A-B)+C

d) C-(A+B)


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