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人気のある代数 >

-4x^2-42x+22=0

解

- 4 x^{2} - 42 x + 22 = 0

解

x = - 11, x = \frac{1}{2}

+1

十進法表記

x = - 11, x = 0.5

解答ステップ

- 4 x^{2} - 42 x + 22 = 0

解くとthe二次式

x_{1, 2} = \frac{- ( - 42 ) \pm ( - 42 ) ^{2} - 4 ( - 4 ) \cdot 22}{2 ( - 4 )}

(- 42)^{2} - 4 (- 4) \cdot 22 = 46

x_{1, 2} = \frac{- ( - 42 ) \pm 46}{2 ( - 4 )}

解を分離する

x_{1} = \frac{- ( - 42 ) + 46}{2 ( - 4 )}, x_{2} = \frac{- ( - 42 ) - 46}{2 ( - 4 )}

x = \frac{- ( - 42 ) + 46}{2 ( - 4 )} : - 11

x = \frac{- ( - 42 ) - 46}{2 ( - 4 )} : \frac{1}{2}

二次equationの解:

x = - 11, x = \frac{1}{2}

グラフ

人気の例

v^{2} + 3 v - 28 = 0

completesquare x^2-13x+36=0

co m pl e t es q u a re x^{2} - 13 x + 36 = 0

30 v = 9 v^{2} + 25

x^2-2(m^2-4m)x+m^4=0

x^{2} - 2 (m^{2} - 4 m) x + m^{4} = 0

solvefor x,x^2+5xy=9x+3y

so l v e f or x, x^{2} + 5 x y = 9 x + 3 y