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  5. なんで30abになるのか教えてください🙏
Mathematics
Senior High
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まろん
まろん

なんで30abになるのか教えてください🙏

✰✰✰✰ (2) (3a - 5b)² : ( 20 - 5 b ) ( 30 -ħ b) 9a² - 300b + iħ be

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