oblicz zadanie
(7-2√3) ^ 2
(7-2√3)² = 7² - 2·7·2√3 + (2√3)² = 49 - 28√3 + 12 = 61 - 28√3
(a-b)² = a²-2ab+b²
(a+b)² = a²+2ab+b²
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(7-2√3)² = 7² - 2·7·2√3 + (2√3)² = 49 - 28√3 + 12 = 61 - 28√3
(a-b)² = a²-2ab+b²
(a+b)² = a²+2ab+b²