Выполни умножение: (4a7−5b2)⋅(4a7+5b2) .

Выбери правильный ответ:
1) 4a14−5b4
2) 16a14−25b4
3) 16a14+40a7b2+25b4
4) 16a14−40a7b2+25b4
5) 16a14−40a7b2−25b4
6) 16a9−25b2
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