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受欢迎的代数 >

4e^2+90.17e-68.98=0

解答

4 e^{2} + 90.17 e - 68.98 = 0

解答

e = \frac{- 9017 + 92343089}{800}, e = \frac{- 9017 - 92343089}{800}

+1

十进制

e = 0.74066 \dots, e = - 23.28316 \dots

求解步骤

4 e^{2} + 90.17 e - 68.98 = 0

在两边乘以

100

400 e^{2} + 9017 e - 6898 = 0

使用求根公式求解

e_{1, 2} = \frac{- 9017 \pm 901 7 ^{2} - 4 \cdot 400 ( - 6898 )}{2 \cdot 400}

901 7^{2} - 4 \cdot 400 (- 6898) = 92343089

e_{1, 2} = \frac{- 9017 \pm 92343089}{2 \cdot 400}

将解分隔开

e_{1} = \frac{- 9017 + 92343089}{2 \cdot 400}, e_{2} = \frac{- 9017 - 92343089}{2 \cdot 400}

e = \frac{- 9017 + 92343089}{2 \cdot 400} : \frac{- 9017 + 92343089}{800}

e = \frac{- 9017 - 92343089}{2 \cdot 400} : \frac{- 9017 - 92343089}{800}

二次方程组的解是:

e = \frac{- 9017 + 92343089}{800}, e = \frac{- 9017 - 92343089}{800}

作图

流行的例子

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