Ответ:
1) a²×(a-1)
2) 7b²-7b+5
3) 2ac-2bc
4) x × (6x²- 1 - 4x)
5) 3m²- 4m²n
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Ответ:
1) a²×(a-1)
2) 7b²-7b+5
3) 2ac-2bc
4) x × (6x²- 1 - 4x)
5) 3m²- 4m²n