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人気のある代数 >

solvefor t,0=0+17.2*t+1/2 (-9.8)t^2

解

t, 0 = 0 + 17.2 \cdot t + \frac{1}{2} (- 9.8) t^{2}

解

t = 0, t = \frac{172}{49}

+1

十進法表記

t = 0, t = 3.51020 \dots

解答ステップ

0 = 0 + 17.2 t + \frac{1}{2} (- 9.8) t^{2}

以下で両辺を乗じる:

10

0 = - 49 t^{2} + 172 t

辺を交換する

- 49 t^{2} + 172 t = 0

解くとthe二次式

t_{1, 2} = \frac{- 172 \pm 17 2 ^{2} - 4 ( - 49 ) \cdot 0}{2 ( - 49 )}

17 2^{2} - 4 (- 49) \cdot 0 = 172

t_{1, 2} = \frac{- 172 \pm 172}{2 ( - 49 )}

解を分離する

t_{1} = \frac{- 172 + 172}{2 ( - 49 )}, t_{2} = \frac{- 172 - 172}{2 ( - 49 )}

t = \frac{- 172 + 172}{2 ( - 49 )} : 0

t = \frac{- 172 - 172}{2 ( - 49 )} : \frac{172}{49}

二次equationの解:

t = 0, t = \frac{172}{49}

グラフ

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