Mathematics
Senior High
Resolved
下から2行目の式でマイナスがどうして出てくるのかがわかりません。
②⑳ *2二2z=ニ%とおくと (2z十2)9ヶー9%
(人Mey = 2%寺2
2
@テ 十2ヶ め 2上2ァ
-引さッ
H
2e?
1
2e 7+27
圭C
+@
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