September 2018 2 19 Report

Zapisz w najprostszej postaci:

1.2x+5y-7-3x+8y-10

2.5a2(do potegi 2)-7a+2ab-2a-10a2-3ab

3.1/2(jedna druga)x2+2,5xy-1,5y2-2,5xy=31/2(trzy i jedna druga)y2=4,5xy

4.n2-n=6n2-5-7n

5.4ab2+2a2b(2 a do potegi drugiej b)-6a2b2-4a2b+ab2-a2b2+6a2b2-2a2b


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