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9| |次の式を展開せよ、 (1) (2+5)%2一5):

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✨ Best Answer ✨

(1) (a+5)²(a−5)²
 ={(a+5)(a−5)}²
 =(a²−25)²
 =a⁴−50a²+625

ゲスト

ありがとうございます!!

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