Mathematics
Senior High
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(x②-1)(x②+2)で(x②-1)がさらに分けられるのはわかりました。(x②+2)ってまだ分けられそうなかんじがするんですけど、(x+1)(x+2)でわけないのはなんでですか？？
(2) x4+x2-2
=(x²-2
=(x-1)(x+2)
(x+1)(x-1)(x+2)
N
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