簡約 (7sqrt(2)+x)(7sqrt(2)-x)

解

簡約

(72 + x) (72 - x)

98 - x^{2}

解答ステップ

(72 + x) (72 - x)

2つの正方形の差

(72 + x) (72 - x) を適用します : 98 - x^{2}

= 98 - x^{2}

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