Mathematics
Senior High
どのように因数分解して(k-1)(a-1)=0になるかわかりますか。
の2次方程式x2+kx+1=0, x2+x+k=
た, その共通な解を求めよ。
a²+ ka + 1 = 0
- 2α²+a+k=0
(k-1)a+1-k=6
(k-1)(a-1) = 0
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