Odpowiedzi

2010-02-27T17:56:39+01:00
A) 49x² - 4 = (7x - 2)(7x +2)
to z wzoru (a-b)(a+b) = a²-b²
b) (x - √2)³ = x³ - 3√2x² + 6x - 2√2
to z wzoru (a-b)³= a³- 3a²b + 3ab² - b³
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