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受欢迎的代数 >

-9e^2+5e-9=0

解答

- 9 e^{2} + 5 e - 9 = 0

解答

e = \frac{5}{18} - i \frac{299}{18}, e = \frac{5}{18} + i \frac{299}{18}

求解步骤

- 9 e^{2} + 5 e - 9 = 0

使用求根公式求解

e_{1, 2} = \frac{- 5 \pm 5 ^{2} - 4 ( - 9 ) ( - 9 )}{2 ( - 9 )}

化简

5^{2} - 4 (- 9) (- 9) : 299 i

e_{1, 2} = \frac{- 5 \pm 299 i}{2 ( - 9 )}

将解分隔开

e_{1} = \frac{- 5 + 299 i}{2 ( - 9 )}, e_{2} = \frac{- 5 - 299 i}{2 ( - 9 )}

e = \frac{- 5 + 299 i}{2 ( - 9 )} : \frac{5}{18} - i \frac{299}{18}

e = \frac{- 5 - 299 i}{2 ( - 9 )} : \frac{5}{18} + i \frac{299}{18}

二次方程组的解是:

e = \frac{5}{18} - i \frac{299}{18}, e = \frac{5}{18} + i \frac{299}{18}

作图

流行的例子

x^{2} + x + 0.25 = 0

7x^2+34=5x^2+20+14

7 x^{2} + 34 = 5 x^{2} + 20 + 14

0 = - x^{2} + 4 x - 4

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