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人気のある代数 >

-3x^2-18x-26=0

解

- 3 x^{2} - 18 x - 26 = 0

解

x = - \frac{9 + 3}{3}, x = - \frac{9 - 3}{3}

+1

十進法表記

x = - 3.57735 \dots, x = - 2.42264 \dots

解答ステップ

- 3 x^{2} - 18 x - 26 = 0

解くとthe二次式

x_{1, 2} = \frac{- ( - 18 ) \pm ( - 18 ) ^{2} - 4 ( - 3 ) ( - 26 )}{2 ( - 3 )}

(- 18)^{2} - 4 (- 3) (- 26) = 23

x_{1, 2} = \frac{- ( - 18 ) \pm 2 3}{2 ( - 3 )}

解を分離する

x_{1} = \frac{- ( - 18 ) + 2 3}{2 ( - 3 )}, x_{2} = \frac{- ( - 18 ) - 2 3}{2 ( - 3 )}

x = \frac{- ( - 18 ) + 2 3}{2 ( - 3 )} : - \frac{9 + 3}{3}

x = \frac{- ( - 18 ) - 2 3}{2 ( - 3 )} : - \frac{9 - 3}{3}

二次equationの解:

x = - \frac{9 + 3}{3}, x = - \frac{9 - 3}{3}

グラフ

人気の例

0.2x^2-6x+80=0.6x^2-12x+80

0.2 x^{2} - 6 x + 80 = 0.6 x^{2} - 12 x + 80

solvefor a,c=ba+a^2

so l v e f or a, c = ba + a^{2}

- 2 x^{2} + 12 x - 8 = 0

(3x+2)^2-5(3x+2)=0

(3 x + 2)^{2} - 5 (3 x + 2) = 0

b^{2} + 3 b - 10 = 0