Mathematics
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x²-4x-2=0の計算の仕方を教えてください

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✨ Best Answer ✨

パターン1 解の公式を使って求める

パターン2 x²-4x = 2
x²-4x +? = 2+? 
平方完成を行うため+4を入れる

x²-4x +4 = 2 +4
これを解いて答えが出るはずです

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