Объяснение:
е) (3n-m)(3n+m)
ж) (a+1)(a²-a+1)
з) (7p-q²)(7p+q²)
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Объяснение:
е) (3n-m)(3n+m)
ж) (a+1)(a²-a+1)
з) (7p-q²)(7p+q²)