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人気のある代数 >

(9x-14)(8x+15)=7+13x

解

(9 x - 14) (8 x + 15) = 7 + 13 x

解

x = \frac{- 5 + 15649}{72}, x = - \frac{5 + 15649}{72}

+1

十進法表記

x = 1.66799 \dots, x = - 1.80688 \dots

解答ステップ

(9 x - 14) (8 x + 15) = 7 + 13 x

拡張

(9 x - 14) (8 x + 15) : 72 x^{2} + 23 x - 210

72 x^{2} + 23 x - 210 = 7 + 13 x

13 x

を左側に移動します

72 x^{2} + 10 x - 210 = 7

7

を左側に移動します

72 x^{2} + 10 x - 217 = 0

解くとthe二次式

x_{1, 2} = \frac{- 10 \pm 1 0 ^{2} - 4 \cdot 72 ( - 217 )}{2 \cdot 72}

1 0^{2} - 4 \cdot 72 (- 217) = 215649

x_{1, 2} = \frac{- 10 \pm 2 15649}{2 \cdot 72}

解を分離する

x_{1} = \frac{- 10 + 2 15649}{2 \cdot 72}, x_{2} = \frac{- 10 - 2 15649}{2 \cdot 72}

x = \frac{- 10 + 2 15649}{2 \cdot 72} : \frac{- 5 + 15649}{72}

x = \frac{- 10 - 2 15649}{2 \cdot 72} : - \frac{5 + 15649}{72}

二次equationの解:

x = \frac{- 5 + 15649}{72}, x = - \frac{5 + 15649}{72}

グラフ

人気の例

5 x^{2} + x - \frac{1}{20} = 0

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