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人気のある代数 >

-5x^2-6x+2=0

解

- 5 x^{2} - 6 x + 2 = 0

解

x = - \frac{3 + 19}{5}, x = \frac{19 - 3}{5}

+1

十進法表記

x = - 1.47177 \dots, x = 0.27177 \dots

解答ステップ

- 5 x^{2} - 6 x + 2 = 0

解くとthe二次式

x_{1, 2} = \frac{- ( - 6 ) \pm ( - 6 ) ^{2} - 4 ( - 5 ) \cdot 2}{2 ( - 5 )}

(- 6)^{2} - 4 (- 5) \cdot 2 = 219

x_{1, 2} = \frac{- ( - 6 ) \pm 2 19}{2 ( - 5 )}

解を分離する

x_{1} = \frac{- ( - 6 ) + 2 19}{2 ( - 5 )}, x_{2} = \frac{- ( - 6 ) - 2 19}{2 ( - 5 )}

x = \frac{- ( - 6 ) + 2 19}{2 ( - 5 )} : - \frac{3 + 19}{5}

x = \frac{- ( - 6 ) - 2 19}{2 ( - 5 )} : \frac{19 - 3}{5}

二次equationの解:

x = - \frac{3 + 19}{5}, x = \frac{19 - 3}{5}

グラフ

人気の例

solvefor x,4x^2+3xy+5y=0

so l v e f or x, 4 x^{2} + 3 x y + 5 y = 0

solvefor y,y^2(2a-x)=x^3

so l v e f or y, y^{2} (2 a - x) = x^{3}

x^{2} + 8 x + 4 = 3

64 = - 16 t^{2} + 80 t

solvefor x,2x^2-xy+y=1

so l v e f or x, 2 x^{2} - x y + y = 1