Mathematics
Senior High
明日、小テストがあるのですが……
1行目から2行目の展開が分からないので教えていただきたいです
1 3リ
④ 22+92z-[ (2*29)gx
1
(4 (与式)
1
| 2②%+9gx+し IKZ4 +3)Zy
ー1
ー3
、 (2z2 +92z=| 二3*
3
l
ーー…
1
-3
+3]-(-5-9=二
ーー
co| to
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