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受欢迎的代数 >

14t-1.86t^2=0

解答

14 t - 1.86 t^{2} = 0

解答

t = 0, t = \frac{700}{93}

+1

十进制

t = 0, t = 7.52688 \dots

求解步骤

14 t - 1.86 t^{2} = 0

在两边乘以

100

1400 t - 186 t^{2} = 0

改写成标准形式

a x^{2} + b x + c = 0

- 186 t^{2} + 1400 t = 0

使用求根公式求解

t_{1, 2} = \frac{- 1400 \pm 140 0 ^{2} - 4 ( - 186 ) \cdot 0}{2 ( - 186 )}

140 0^{2} - 4 (- 186) \cdot 0 = 1400

t_{1, 2} = \frac{- 1400 \pm 1400}{2 ( - 186 )}

将解分隔开

t_{1} = \frac{- 1400 + 1400}{2 ( - 186 )}, t_{2} = \frac{- 1400 - 1400}{2 ( - 186 )}

t = \frac{- 1400 + 1400}{2 ( - 186 )} : 0

t = \frac{- 1400 - 1400}{2 ( - 186 )} : \frac{700}{93}

二次方程组的解是:

t = 0, t = \frac{700}{93}

作图

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