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人気のある代数 >

(x-5)(x-8)=8

解

(x - 5) (x - 8) = 8

解

x = \frac{13 + 41}{2}, x = \frac{13 - 41}{2}

+1

十進法表記

x = 9.70156 \dots, x = 3.29843 \dots

解答ステップ

(x - 5) (x - 8) = 8

拡張

(x - 5) (x - 8) : x^{2} - 13 x + 40

x^{2} - 13 x + 40 = 8

8

を左側に移動します

x^{2} - 13 x + 32 = 0

解くとthe二次式

x_{1, 2} = \frac{- ( - 13 ) \pm ( - 13 ) ^{2} - 4 \cdot 1 \cdot 32}{2 \cdot 1}

(- 13)^{2} - 4 \cdot 1 \cdot 32 = 41

x_{1, 2} = \frac{- ( - 13 ) \pm 41}{2 \cdot 1}

解を分離する

x_{1} = \frac{- ( - 13 ) + 41}{2 \cdot 1}, x_{2} = \frac{- ( - 13 ) - 41}{2 \cdot 1}

x = \frac{- ( - 13 ) + 41}{2 \cdot 1} : \frac{13 + 41}{2}

x = \frac{- ( - 13 ) - 41}{2 \cdot 1} : \frac{13 - 41}{2}

二次equationの解:

x = \frac{13 + 41}{2}, x = \frac{13 - 41}{2}

グラフ

人気の例

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14 x^{2} + x - 26 = 2 x^{2} - 4

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