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人気のある代数 >

-4.905t^2+12t+80=0

解

- 4.905 t^{2} + 12 t + 80 = 0

解

t = - \frac{- 12000 + 1713600000}{9810}, t = \frac{12000 + 1713600000}{9810}

+1

十進法表記

t = - 2.99649 \dots, t = 5.44298 \dots

解答ステップ

- 4.905 t^{2} + 12 t + 80 = 0

以下で両辺を乗じる:

1000

- 4905 t^{2} + 12000 t + 80000 = 0

解くとthe二次式

t_{1, 2} = \frac{- 12000 \pm 1200 0 ^{2} - 4 ( - 4905 ) \cdot 80000}{2 ( - 4905 )}

1200 0^{2} - 4 (- 4905) \cdot 80000 = 1713600000

t_{1, 2} = \frac{- 12000 \pm 1713600000}{2 ( - 4905 )}

解を分離する

t_{1} = \frac{- 12000 + 1713600000}{2 ( - 4905 )}, t_{2} = \frac{- 12000 - 1713600000}{2 ( - 4905 )}

t = \frac{- 12000 + 1713600000}{2 ( - 4905 )} : - \frac{- 12000 + 1713600000}{9810}

t = \frac{- 12000 - 1713600000}{2 ( - 4905 )} : \frac{12000 + 1713600000}{9810}

二次equationの解:

t = - \frac{- 12000 + 1713600000}{9810}, t = \frac{12000 + 1713600000}{9810}

グラフ

人気の例

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