Rozłóż na czynniki:
a)(a-b) 3+ (b-c)3 + (c-a)3
b) (a+b+c)3-a3 – b3 – c3
a)3a-3b+3b-3c+3c-3a=0 (redukujemy)
b)
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a)3a-3b+3b-3c+3c-3a=0 (redukujemy)
b)