Mathematics
Senior High
解き方を教えて頂けませんか？🙇🏼♀️
〔9〕 α, bを定数とし, a+b=1のとき, 2次方程式 ax²+bx-1=0が重解をもつとする。
このとき,aの値は次のうちのどれか。
① -1-2√/2
2 -3
④
-1+2√/2
⑤
3
SCAREXON+* (S
otul sad Ćox 400
(3)-1
③
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