September 2021 0 10 Report
1) Найдите удвоенное произведение: (12a +1)² = 144a² +… + 1 * 26a

13a

144a

24a

2) Найдите удвоенное произведение: (3x +7)²= 9x² +… + 49 *

10x

42x

21x

100x​
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