August 2018 1 11 Report
1.Iloczyn (5x - 2y) * (5x + 2y) jest równy:

A.25x² + 4y² C.25x² - 2y
B.25x² - 4y² D.25x² - 10xy - 4y²

2.Liczba 145² - 45² jest równa:

A.100 B.10000 C.19000 D.20000

3.Liczba 397² - 3²

A.397 B.400 C.9 D.397²
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