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人気のある代数 >

-7x^2+17x+12=0

解

- 7 x^{2} + 17 x + 12 = 0

解

x = - \frac{4}{7}, x = 3

+1

十進法表記

x = - 0.57142 \dots, x = 3

解答ステップ

- 7 x^{2} + 17 x + 12 = 0

解くとthe二次式

x_{1, 2} = \frac{- 17 \pm 1 7 ^{2} - 4 ( - 7 ) \cdot 12}{2 ( - 7 )}

1 7^{2} - 4 (- 7) \cdot 12 = 25

x_{1, 2} = \frac{- 17 \pm 25}{2 ( - 7 )}

解を分離する

x_{1} = \frac{- 17 + 25}{2 ( - 7 )}, x_{2} = \frac{- 17 - 25}{2 ( - 7 )}

x = \frac{- 17 + 25}{2 ( - 7 )} : - \frac{4}{7}

x = \frac{- 17 - 25}{2 ( - 7 )} : 3

二次equationの解:

x = - \frac{4}{7}, x = 3

グラフ

人気の例

4 - 2 a^{2} = - 7

solvefor x,8x^2-6y^2-16x+24y-16=0

so l v e f or x, 8 x^{2} - 6 y^{2} - 16 x + 24 y - 16 = 0

(4 x - 3) (5 x - 4) = 0

x^{2} - 18 x = - 31

x^{2} + 10 x + 22 = 13