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人気のある代数 >

-8x^2+13x+6=0

解

- 8 x^{2} + 13 x + 6 = 0

解

x = - \frac{3}{8}, x = 2

+1

十進法表記

x = - 0.375, x = 2

解答ステップ

- 8 x^{2} + 13 x + 6 = 0

解くとthe二次式

x_{1, 2} = \frac{- 13 \pm 1 3 ^{2} - 4 ( - 8 ) \cdot 6}{2 ( - 8 )}

1 3^{2} - 4 (- 8) \cdot 6 = 19

x_{1, 2} = \frac{- 13 \pm 19}{2 ( - 8 )}

解を分離する

x_{1} = \frac{- 13 + 19}{2 ( - 8 )}, x_{2} = \frac{- 13 - 19}{2 ( - 8 )}

x = \frac{- 13 + 19}{2 ( - 8 )} : - \frac{3}{8}

x = \frac{- 13 - 19}{2 ( - 8 )} : 2

二次equationの解:

x = - \frac{3}{8}, x = 2

グラフ

人気の例

x^{2} + x (x - 6) = 0

solvefor x,3x^2+4x-4=0

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

completesquare 4y^2-4y+5

co m pl e t es q u a re 4 y^{2} - 4 y + 5

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

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

(x + 2) (x - 3) = 2