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人気のある代数 >

7x^2-8x^2-21x+24=0

解

7 x^{2} - 8 x^{2} - 21 x + 24 = 0

解

x = - \frac{21 + 537}{2}, x = \frac{537 - 21}{2}

+1

十進法表記

x = - 22.08663 \dots, x = 1.08663 \dots

解答ステップ

7 x^{2} - 8 x^{2} - 21 x + 24 = 0

改良

- x^{2} - 21 x + 24 = 0

解くとthe二次式

x_{1, 2} = \frac{- ( - 21 ) \pm ( - 21 ) ^{2} - 4 ( - 1 ) \cdot 24}{2 ( - 1 )}

(- 21)^{2} - 4 (- 1) \cdot 24 = 537

x_{1, 2} = \frac{- ( - 21 ) \pm 537}{2 ( - 1 )}

解を分離する

x_{1} = \frac{- ( - 21 ) + 537}{2 ( - 1 )}, x_{2} = \frac{- ( - 21 ) - 537}{2 ( - 1 )}

x = \frac{- ( - 21 ) + 537}{2 ( - 1 )} : - \frac{21 + 537}{2}

x = \frac{- ( - 21 ) - 537}{2 ( - 1 )} : \frac{537 - 21}{2}

二次equationの解:

x = - \frac{21 + 537}{2}, x = \frac{537 - 21}{2}

グラフ

人気の例

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