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人気のある代数 >

9x^2-18x-23=0

解

9 x^{2} - 18 x - 23 = 0

解

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

+1

十進法表記

x = 2.88561 \dots, x = - 0.88561 \dots

解答ステップ

9 x^{2} - 18 x - 23 = 0

解くとthe二次式

x_{1, 2} = \frac{- ( - 18 ) \pm ( - 18 ) ^{2} - 4 \cdot 9 ( - 23 )}{2 \cdot 9}

(- 18)^{2} - 4 \cdot 9 (- 23) = 242

x_{1, 2} = \frac{- ( - 18 ) \pm 24 2}{2 \cdot 9}

解を分離する

x_{1} = \frac{- ( - 18 ) + 24 2}{2 \cdot 9}, x_{2} = \frac{- ( - 18 ) - 24 2}{2 \cdot 9}

x = \frac{- ( - 18 ) + 24 2}{2 \cdot 9} : \frac{3 + 4 2}{3}

x = \frac{- ( - 18 ) - 24 2}{2 \cdot 9} : \frac{3 - 4 2}{3}

二次equationの解:

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

グラフ

人気の例

x^3+3=x^3+x^2-5

x^{3} + 3 = x^{3} + x^{2} - 5

completesquare x^2+6x=27

co m pl e t es q u a re x^{2} + 6 x = 27

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(x + 5)^{2} + 6 = 2 (x + 4) (x + 2)

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