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受欢迎的代数 >

-11x^2+26x+61=0

解答

- 11 x^{2} + 26 x + 61 = 0

解答

x = - \frac{- 13 + 2 210}{11}, x = \frac{13 + 2 210}{11}

+1

十进制

x = - 1.45297 \dots, x = 3.81661 \dots

求解步骤

- 11 x^{2} + 26 x + 61 = 0

使用求根公式求解

x_{1, 2} = \frac{- 26 \pm 2 6 ^{2} - 4 ( - 11 ) \cdot 61}{2 ( - 11 )}

2 6^{2} - 4 (- 11) \cdot 61 = 4210

x_{1, 2} = \frac{- 26 \pm 4 210}{2 ( - 11 )}

将解分隔开

x_{1} = \frac{- 26 + 4 210}{2 ( - 11 )}, x_{2} = \frac{- 26 - 4 210}{2 ( - 11 )}

x = \frac{- 26 + 4 210}{2 ( - 11 )} : - \frac{- 13 + 2 210}{11}

x = \frac{- 26 - 4 210}{2 ( - 11 )} : \frac{13 + 2 210}{11}

二次方程组的解是:

x = - \frac{- 13 + 2 210}{11}, x = \frac{13 + 2 210}{11}

作图

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