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人気のある代数 >

2x^2-0.41x-1.27=0

解

2 x^{2} - 0.41 x - 1.27 = 0

解

x = \frac{41 + 103281}{400}, x = \frac{41 - 103281}{400}

+1

十進法表記

x = 0.90593 \dots, x = - 0.70093 \dots

解答ステップ

2 x^{2} - 0.41 x - 1.27 = 0

以下で両辺を乗じる:

100

200 x^{2} - 41 x - 127 = 0

解くとthe二次式

x_{1, 2} = \frac{- ( - 41 ) \pm ( - 41 ) ^{2} - 4 \cdot 200 ( - 127 )}{2 \cdot 200}

(- 41)^{2} - 4 \cdot 200 (- 127) = 103281

x_{1, 2} = \frac{- ( - 41 ) \pm 103281}{2 \cdot 200}

解を分離する

x_{1} = \frac{- ( - 41 ) + 103281}{2 \cdot 200}, x_{2} = \frac{- ( - 41 ) - 103281}{2 \cdot 200}

x = \frac{- ( - 41 ) + 103281}{2 \cdot 200} : \frac{41 + 103281}{400}

x = \frac{- ( - 41 ) - 103281}{2 \cdot 200} : \frac{41 - 103281}{400}

二次equationの解:

x = \frac{41 + 103281}{400}, x = \frac{41 - 103281}{400}

グラフ

人気の例

solvefor x,4x^2(36-k^2)=0

so l v e f or x, 4 x^{2} (36 - k^{2}) = 0

\frac{4}{6} = x^{2}

(u)^{2} + u \cdot 2^{2} = 3

4 u^{2} - 7 u - 2 = 0

-4(x-1)^2+28=-100

- 4 (x - 1)^{2} + 28 = - 100