1) Выберите формулу сокращенного умножения (a-b)² ... * a²-2ab +b²

a²-2ab -b²

a²+2ab+b²

a²+2ab -b²

2) Найдите удвоенное произведение: (n+6)²= n² + … + 36 *

6n

36n

12n

60n​
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