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平方完成法（最小値と最大値） - | SHS 1 選択科目 数学

Determine if a quadratic has a max or min value then find it (mistake)

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平方完成法で解く | ステップバイステップのテクニック

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Quadratic Equations - Completing The Square Maximum Or Minimum Value | O-Level Additional Math

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min and maximum from completing the square

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スクエアを完成させる最速の方法!!（48秒以内）

完成平方法の簡略化