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人気のある代数 >

-4.9x^2+2x+10=0

解

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

解

x = - \frac{10 ( 5 2 - 1 )}{49}, x = \frac{10 ( 1 + 5 2 )}{49}

+1

十進法表記

x = - 1.23899 \dots, x = 1.64715 \dots

解答ステップ

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

以下で両辺を乗じる:

10

- 49 x^{2} + 20 x + 100 = 0

解くとthe二次式

x_{1, 2} = \frac{- 20 \pm 2 0 ^{2} - 4 ( - 49 ) \cdot 100}{2 ( - 49 )}

2 0^{2} - 4 (- 49) \cdot 100 = 1002

x_{1, 2} = \frac{- 20 \pm 100 2}{2 ( - 49 )}

解を分離する

x_{1} = \frac{- 20 + 100 2}{2 ( - 49 )}, x_{2} = \frac{- 20 - 100 2}{2 ( - 49 )}

x = \frac{- 20 + 100 2}{2 ( - 49 )} : - \frac{10 ( 5 2 - 1 )}{49}

x = \frac{- 20 - 100 2}{2 ( - 49 )} : \frac{10 ( 1 + 5 2 )}{49}

二次equationの解:

x = - \frac{10 ( 5 2 - 1 )}{49}, x = \frac{10 ( 1 + 5 2 )}{49}

グラフ

人気の例

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

x^{2} - 8 x + 9 = 56

solvefor x,(x+y)(x+y)=1

so l v e f or x, (x + y) (x + y) = 1

completesquare 2x^2+3x+4

co m pl e t es q u a re 2 x^{2} + 3 x + 4

(x-8)(x+4)=(x-4x)(x-3)

(x - 8) (x + 4) = (x - 4 x) (x - 3)