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✨ Best Answer ✨

xy-5x-5y
=x(y-5)-5y
=x(y-5)-5y+25-25
=x(y-5)-5(y-5)-25
=(x-5)(y-5)-25

まんじゅう

細かく教えていただきありがとうございます🙇🏻‍♀️おかげ様で理解できました!

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