Виконай множення: (13c−411d)⋅(13c+411d) .
Обери правильну відповідь:
1. 19c2−16121d2
2. 19c2−2⋅13c⋅411d+16121d2
3.19c2+833cd+16121d2
4.19c2+2⋅13c⋅411d+16121d2
5. 19c2−833cd+16121d2
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