October 2021 1 20 Report
Выполни умножение
(17c−313d)⋅(17c+313d) .
Варианты:
1) 149c2+691cd+9169d2

2)149c2−9169d2

3) 149c2−691cd+9169d2

4) 149c2−2⋅17c⋅313d+9169d2

5)149c2+2⋅17c⋅313d+9169d2
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