Mathematics
Senior High
問13の解説してください！
答えは、a2＋b2＋C2＋d 2＋2ab＋2ac＋2ad＋2bc＋2bd＋2cd
になります
問13(a+b+c+d)°を展開せよ。
数学の
数の計算に乗法公式を利用してみよう
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