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参考・概略です

 7.5²/100

 【100=10² なので】

=7.5²/10²

 【a²/b²=(q/b)² なので】

=(7.5/10)²

 【7.5/10=0.75 なので】

=0.75²

てぃらみす

理解できました!ありがとうございます!

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