Mathematics
Junior High
Resolved
ここの解き方を教えて欲しいです🙇♀️
7a=3-√5,b=3+√5のとき,次の式の値を求めなさい。
(1) a²-2a-3-4√5 +5
(3) a²-6² 12 NS
-12√3
(2) a2-6a+9 5
(4) a²+2ab+b² 36
B5
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