Mathematics
Junior High
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よろしくお願いします

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✨ Best Answer ✨

2乗-2乗でやった方が楽そうです!
分子=(26+13)(26-13)
+(44+31)(44-31)
+(62+49)(62-49)
=39×13+75×13+111×13
=(39+75+111)×13
=225×13
=25×9×13
分子÷分母=(25×9×13)/(13×13×9)
=25/13

渼櫻

ありがとうございます!

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