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受欢迎的代数 >

0=-1/2 x^2+850x

解答

0 = - \frac{1}{2} x^{2} + 850 x

解答

x = 0, x = 1700

求解步骤

0 = - \frac{1}{2} x^{2} + 850 x

在两边乘以

2

0 = - x^{2} + 1700 x

交换两边

- x^{2} + 1700 x = 0

使用求根公式求解

x_{1, 2} = \frac{- 1700 \pm 170 0 ^{2} - 4 ( - 1 ) \cdot 0}{2 ( - 1 )}

170 0^{2} - 4 (- 1) \cdot 0 = 1700

x_{1, 2} = \frac{- 1700 \pm 1700}{2 ( - 1 )}

将解分隔开

x_{1} = \frac{- 1700 + 1700}{2 ( - 1 )}, x_{2} = \frac{- 1700 - 1700}{2 ( - 1 )}

x = \frac{- 1700 + 1700}{2 ( - 1 )} : 0

x = \frac{- 1700 - 1700}{2 ( - 1 )} : 1700

二次方程组的解是:

x = 0, x = 1700

作图

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