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人気のある代数 >

-x^2-5x+10=0

解

- x^{2} - 5 x + 10 = 0

解

x = - \frac{5 + 65}{2}, x = \frac{65 - 5}{2}

+1

十進法表記

x = - 6.53112 \dots, x = 1.53112 \dots

解答ステップ

- x^{2} - 5 x + 10 = 0

解くとthe二次式

x_{1, 2} = \frac{- ( - 5 ) \pm ( - 5 ) ^{2} - 4 ( - 1 ) \cdot 10}{2 ( - 1 )}

(- 5)^{2} - 4 (- 1) \cdot 10 = 65

x_{1, 2} = \frac{- ( - 5 ) \pm 65}{2 ( - 1 )}

解を分離する

x_{1} = \frac{- ( - 5 ) + 65}{2 ( - 1 )}, x_{2} = \frac{- ( - 5 ) - 65}{2 ( - 1 )}

x = \frac{- ( - 5 ) + 65}{2 ( - 1 )} : - \frac{5 + 65}{2}

x = \frac{- ( - 5 ) - 65}{2 ( - 1 )} : \frac{65 - 5}{2}

二次equationの解:

x = - \frac{5 + 65}{2}, x = \frac{65 - 5}{2}

グラフ

人気の例

completesquare x^2+2x-18

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

x^2(-8b+7)=-8b+6

x^{2} (- 8 b + 7) = - 8 b + 6

solvefor x,x(x-5)=0

so l v e f or x, x (x - 5) = 0

10 n^{2} - 3 n - 1 = 0

solvefor t,f(t-2)=5t^2-7t+3

so l v e f or t, f (t - 2) = 5 t^{2} - 7 t + 3