October 2018 1 21 Report

Wykonaj działąnia i zapisz w najprostrzej postaci:

1. 3b ( 5a - 2b) + ( 2a - 3b ) * a - b2 =

2. ( a2 - 2ab ) * 9a2 - ( 9ab3 - 12a4b2 ) : 3ab =

3. - 4 ( x - 2y - 1 ) - ( - 2x ) ( 2x + 3y +2 ) + ( - 6xy ) =

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