August 2018 2 9 Report
Usuń nawiasy i wykonaj redukcję wyrazów podobnych . :

( ⅗ m² + ⅔ n² + 6 ) + ( -⅓ m² - ⅔ n² - 2 ⅗ ) =

( 0,5 xy² - 1,2 y² + 5 ) + ( -0,8 y² - 2,5 xy² - 2⅛ ) =

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klasa 1 gim. str. 152 zad. 6 , (przykład b.,c. )
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