Mathematics
Junior High

2行目の-2xyはなぜ無くなったんですか??また、(x-y)二乗 になったことも教えて欲しいです🙇‍♀️

4) 3aて3 4 +3axy'- 6a2 3a2(x+ぎー224) 3a2(2-8) 2
因数分解

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