Mathematics
Senior High
写真の問題なのですが、1行目の有理化の時に、何故このような符号になるのでしょうか。
(2-V8+V5)(X レー
(280属 ンー v5(%
rcGO
て2+ VS -(V5” 5+2V6-
_ 42Y19 2キV10 G+VI
2V6: 、 0半胃
26+2V35 Y6@寺Yi5
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