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人気のある代数 >

-7x^2+12x+64=0

解

- 7 x^{2} + 12 x + 64 = 0

解

x = - \frac{16}{7}, x = 4

+1

十進法表記

x = - 2.28571 \dots, x = 4

解答ステップ

- 7 x^{2} + 12 x + 64 = 0

解くとthe二次式

x_{1, 2} = \frac{- 12 \pm 1 2 ^{2} - 4 ( - 7 ) \cdot 64}{2 ( - 7 )}

1 2^{2} - 4 (- 7) \cdot 64 = 44

x_{1, 2} = \frac{- 12 \pm 44}{2 ( - 7 )}

解を分離する

x_{1} = \frac{- 12 + 44}{2 ( - 7 )}, x_{2} = \frac{- 12 - 44}{2 ( - 7 )}

x = \frac{- 12 + 44}{2 ( - 7 )} : - \frac{16}{7}

x = \frac{- 12 - 44}{2 ( - 7 )} : 4

二次equationの解:

x = - \frac{16}{7}, x = 4

グラフ

人気の例

- 3 x^{2} - 9 = - 5 x

10 x^{2} - 50 = 0

0.3x^2+1.6x-1.3=0

0.3 x^{2} + 1.6 x - 1.3 = 0

2 x^{2} + 9 x - 35 = 0

35 x^{2} + 12 x - 36 = 0