Предмет: Алгебра, автор: Аноним

замените символы * одночленами так, чтобы выполнялось равенство

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Ответы

Автор ответа: bena20193

1

Ответ:

Объяснение:

по формуле (a-b)(a+b)=a²-b²

a) (2c-15a)(2c+15a)=4c²-225a²

б) (9a+11c)(9a-11c)=81a²-121c²

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