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人気のある代数 >

520=3(x-3)(2.1x-3)

解

520 = 3 (x - 3) (2.1 x - 3)

解

x = \frac{27.9 + 13202.01}{12.6}, x = \frac{27.9 - 13202.01}{12.6}

+1

十進法表記

x = 11.33333 \dots, x = - 6.90476 \dots

解答ステップ

520 = 3 (x - 3) (2.1 x - 3)

拡張

3 (x - 3) (2.1 x - 3) : 6.3 x^{2} - 27.9 x + 27

520 = 6.3 x^{2} - 27.9 x + 27

辺を交換する

6.3 x^{2} - 27.9 x + 27 = 520

520

を左側に移動します

6.3 x^{2} - 27.9 x - 493 = 0

解くとthe二次式

x_{1, 2} = \frac{- ( - 27.9 ) \pm ( - 27.9 ) ^{2} - 4 \cdot 6.3 ( - 493 )}{2 \cdot 6.3}

(- 27.9)^{2} - 4 \cdot 6.3 (- 493) = 13202.01

x_{1, 2} = \frac{- ( - 27.9 ) \pm 13202.01}{2 \cdot 6.3}

解を分離する

x_{1} = \frac{- ( - 27.9 ) + 13202.01}{2 \cdot 6.3}, x_{2} = \frac{- ( - 27.9 ) - 13202.01}{2 \cdot 6.3}

x = \frac{- ( - 27.9 ) + 13202.01}{2 \cdot 6.3} : \frac{27.9 + 13202.01}{12.6}

x = \frac{- ( - 27.9 ) - 13202.01}{2 \cdot 6.3} : \frac{27.9 - 13202.01}{12.6}

二次equationの解:

x = \frac{27.9 + 13202.01}{12.6}, x = \frac{27.9 - 13202.01}{12.6}

グラフ

人気の例

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