Mathematics
Senior High
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なぜ赤字の次が（a ³-1）（a ³+8）になるんですか？解説お願いします🙇🏻♂️💦
(3) a6+7a3-8=(a³)²+7a3-8
=(a³-1)(a³+8)
=(a-1)(a²+a+1)(a+2)(a²-2a+4)
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なるほど！ありがとうございました😭❤️🔥