August 2018 3 24 Report
Zapisz w jak najprostszej postaci :
1.) (b+3)² - (b-3)² =
2.) (5m+4n)² - (4m-5n)² =
3.) (3x-2)² + 2(x+3)² =
4.) (y²+1)² -2(y²-1)² =
5.) (5-0,2k³)² + 5(k³-5) =

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