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受欢迎的代数 >

-10x^2-2x+3=0

解答

- 10 x^{2} - 2 x + 3 = 0

解答

x = - \frac{1 + 31}{10}, x = \frac{31 - 1}{10}

+1

十进制

x = - 0.65677 \dots, x = 0.45677 \dots

求解步骤

- 10 x^{2} - 2 x + 3 = 0

使用求根公式求解

x_{1, 2} = \frac{- ( - 2 ) \pm ( - 2 ) ^{2} - 4 ( - 10 ) \cdot 3}{2 ( - 10 )}

(- 2)^{2} - 4 (- 10) \cdot 3 = 231

x_{1, 2} = \frac{- ( - 2 ) \pm 2 31}{2 ( - 10 )}

将解分隔开

x_{1} = \frac{- ( - 2 ) + 2 31}{2 ( - 10 )}, x_{2} = \frac{- ( - 2 ) - 2 31}{2 ( - 10 )}

x = \frac{- ( - 2 ) + 2 31}{2 ( - 10 )} : - \frac{1 + 31}{10}

x = \frac{- ( - 2 ) - 2 31}{2 ( - 10 )} : \frac{31 - 1}{10}

二次方程组的解是:

x = - \frac{1 + 31}{10}, x = \frac{31 - 1}{10}

作图

流行的例子

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