Mathematics
Senior High
1枚目のやり方がわかりません！
2枚目は解説なんですけどなんで{x＋(2ｙ-1)}{x＋(3ｙ＋2)}の形になるんですか？？
教えて欲しいです！
34 位 (与式)ミ[z二(2y-ー1)[*二(3?填2))
ー(*填2yー1)(*十37圭2)
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