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人気のある代数 >

(-3x^2-16x)/(12)+7=0

解

\frac{- 3 x ^{2} - 16 x}{12} + 7 = 0

解

x = - \frac{2 ( 4 + 79 )}{3}, x = \frac{2 ( 79 - 4 )}{3}

+1

十進法表記

x = - 8.59212 \dots, x = 3.25879 \dots

解答ステップ

\frac{- 3 x ^{2} - 16 x}{12} + 7 = 0

以下で両辺を乗じる:

12

- 3 x^{2} - 16 x + 84 = 0

解くとthe二次式

x_{1, 2} = \frac{- ( - 16 ) \pm ( - 16 ) ^{2} - 4 ( - 3 ) \cdot 84}{2 ( - 3 )}

(- 16)^{2} - 4 (- 3) \cdot 84 = 479

x_{1, 2} = \frac{- ( - 16 ) \pm 4 79}{2 ( - 3 )}

解を分離する

x_{1} = \frac{- ( - 16 ) + 4 79}{2 ( - 3 )}, x_{2} = \frac{- ( - 16 ) - 4 79}{2 ( - 3 )}

x = \frac{- ( - 16 ) + 4 79}{2 ( - 3 )} : - \frac{2 ( 4 + 79 )}{3}

x = \frac{- ( - 16 ) - 4 79}{2 ( - 3 )} : \frac{2 ( 79 - 4 )}{3}

二次equationの解:

x = - \frac{2 ( 4 + 79 )}{3}, x = \frac{2 ( 79 - 4 )}{3}

グラフ

人気の例

3 x^{2} + 16 x = 0

2 x^{2} - \frac{1}{2} = 0

-4x^2+6x-16=-5x^2

- 4 x^{2} + 6 x - 16 = - 5 x^{2}

completesquare x^2-10x+27

co m pl e t es q u a re x^{2} - 10 x + 27

completesquare x^2-10x+18

co m pl e t es q u a re x^{2} - 10 x + 18