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受欢迎的代数 >

-0.5=-0.001x^2+0.06x+37.1

解答

- 0.5 = - 0.001 x^{2} + 0.06 x + 37.1

解答

x = - 10 (385 - 3), x = 10 (3 + 385)

+1

十进制

x = - 166.21416 \dots, x = 226.21416 \dots

求解步骤

- 0.5 = - 0.001 x^{2} + 0.06 x + 37.1

在两边乘以

1000

- 500 = - x^{2} + 60 x + 37100

交换两边

- x^{2} + 60 x + 37100 = - 500

将

500

para o lado esquerdo

- x^{2} + 60 x + 37600 = 0

使用求根公式求解

x_{1, 2} = \frac{- 60 \pm 6 0 ^{2} - 4 ( - 1 ) \cdot 37600}{2 ( - 1 )}

6 0^{2} - 4 (- 1) \cdot 37600 = 20385

x_{1, 2} = \frac{- 60 \pm 20 385}{2 ( - 1 )}

将解分隔开

x_{1} = \frac{- 60 + 20 385}{2 ( - 1 )}, x_{2} = \frac{- 60 - 20 385}{2 ( - 1 )}

x = \frac{- 60 + 20 385}{2 ( - 1 )} : - 10 (385 - 3)

x = \frac{- 60 - 20 385}{2 ( - 1 )} : 10 (3 + 385)

二次方程组的解是:

x = - 10 (385 - 3), x = 10 (3 + 385)

作图

流行的例子

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