Какому из указанных ниже многочленов тождественно равно выражение (3а-в)в квадрате? а)3аквадрат-в квадрат б) 9а квадрат - в квадрат в) 9а квадрат-3ав+в квадрат г) 9а квадрат - 6ав+в квадрат

г) 9а квадрат - 6ав+в квадрат

    это формулы сокращенного !

я точно незнаю но скорее всево     ( в )

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Объяснение:

Одно.

Объяснение:

(16n^2-128)/ n^2

отдельно поделим (16n^2) на (n^2) и (-128) на (n^2). Тогда получим следующее выражение:

16 - (128/n^2)

натуральным числом 128/n^2  может быть только тогда, когда n^2 будет делителем числа 128. Следовательно, методом перебора, находим что подходят только  три таких натуральных числа: 1, 2, 4.

Но так как у нас есть еще одно ограничение (16 - (128/n^2) должно быть натуральным числом), не трудно догадаться, что n= 1 нам не подходит; n=2 тоже не подходит; остаётся n=4  — это единственное натуральное число, которое нам подходит.