Предмет: Алгебра, автор: lunaruhc123

решите пожалуйста, поставлю ОЦЕНКУ и СПАСИБО!

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Ответы

Автор ответа: kkkkk5578

Объяснение:

1)2(25-х²)

2(5-х)(5+х)

2)ах²×(х-1)

3)7(с²-2с+1)

7(с-1)²

4)5(х³+2ху+у²)

В1

6561-3078+361/(81-19)(81+19)

3844/6200

31/50=0,62

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