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受欢迎的代数 >

39=-((x^2)/(200))+x-2

解答

39 = - (\frac{x ^{2}}{200}) + x - 2

解答

x = - 302 + 100, x = 302 + 100

+1

十进制

x = 57.57359 \dots, x = 142.42640 \dots

求解步骤

39 = - (\frac{x ^{2}}{200}) + x - 2

整理后得

39 = - \frac{x ^{2}}{200} + x - 2

交换两边

- \frac{x ^{2}}{200} + x - 2 = 39

将

39

para o lado esquerdo

- \frac{x ^{2}}{200} + x - 41 = 0

使用求根公式求解

x_{1, 2} = \frac{- 1 \pm 1 ^{2} - 4 ( - \frac{1}{200} ) ( - 41 )}{2 ( - \frac{1}{200} )}

1^{2} - 4 (- \frac{1}{200}) (- 41) = \frac{3}{5 2}

x_{1, 2} = \frac{- 1 \pm \frac{3}{5 2}}{2 ( - \frac{1}{200} )}

将解分隔开

x_{1} = \frac{- 1 + \frac{3}{5 2}}{2 ( - \frac{1}{200} )}, x_{2} = \frac{- 1 - \frac{3}{5 2}}{2 ( - \frac{1}{200} )}

x = \frac{- 1 + \frac{3}{5 2}}{2 ( - \frac{1}{200} )} : - 302 + 100

x = \frac{- 1 - \frac{3}{5 2}}{2 ( - \frac{1}{200} )} : 302 + 100

二次方程组的解是:

x = - 302 + 100, x = 302 + 100

作图

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