Mathematics
Junior High
なぜ2は分配しないままなのですか？答えは分配しても大丈夫ですか？
(1) 4x (a-1)+2y-2ay
(a-1)-2y (a-1)
=4x
=(a-1) (4x-2y)
=2(a-1) (2x-y)
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