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受欢迎的代数 >

10x^2-27x-9=0

解答

10 x^{2} - 27 x - 9 = 0

解答

x = 3, x = - \frac{3}{10}

+1

十进制

x = 3, x = - 0.3

求解步骤

10 x^{2} - 27 x - 9 = 0

使用求根公式求解

x_{1, 2} = \frac{- ( - 27 ) \pm ( - 27 ) ^{2} - 4 \cdot 10 ( - 9 )}{2 \cdot 10}

(- 27)^{2} - 4 \cdot 10 (- 9) = 33

x_{1, 2} = \frac{- ( - 27 ) \pm 33}{2 \cdot 10}

将解分隔开

x_{1} = \frac{- ( - 27 ) + 33}{2 \cdot 10}, x_{2} = \frac{- ( - 27 ) - 33}{2 \cdot 10}

x = \frac{- ( - 27 ) + 33}{2 \cdot 10} : 3

x = \frac{- ( - 27 ) - 33}{2 \cdot 10} : - \frac{3}{10}

二次方程组的解是:

x = 3, x = - \frac{3}{10}

作图

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