Answers
Answers
-x^2 + 3x + 3 = 0
両辺に-1をかける
x^2 - 3x - 3 = 0
解の公式に当てはめる
x = [3 ± √(-3)^2 - 4{1 * (-3)}] / 2
= (3 ± √21)/2
ありがとうございます🙏
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