Mathematics
Senior High
Resolved

1行目→2行目への計算過程を教えてほしいです!

f(a)-f(B)=(a³-B³)-6(a²-B2)+3a(a-B) =(a-B){(a²+aẞ+B2)-6(a+B)+3a} =(a-B){(a+B)²-aẞ-6(a+B)+3a} BEZ 3次 極大

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