Odpowiedź:
[( 2 +√5)² - (2-√5)] ² = [4 +2√5+5- 2 + √5]^2 = (7 + 3√5)^2 = 49 + 42√5 + 45 = 94 + 42√5
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Odpowiedź:
[( 2 +√5)² - (2-√5)] ² = [4 +2√5+5- 2 + √5]^2 = (7 + 3√5)^2 = 49 + 42√5 + 45 = 94 + 42√5