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受欢迎的代数 >

x^2-1/5 x+0=0

解答

x^{2} - \frac{1}{5} x + 0 = 0

解答

x = \frac{1}{5}, x = 0

+1

十进制

x = 0.2, x = 0

求解步骤

x^{2} - \frac{1}{5} x + 0 = 0

在两边乘以

5

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

5 x^{2} - x = 0

使用求根公式求解

x_{1, 2} = \frac{- ( - 1 ) \pm ( - 1 ) ^{2} - 4 \cdot 5 \cdot 0}{2 \cdot 5}

(- 1)^{2} - 4 \cdot 5 \cdot 0 = 1

x_{1, 2} = \frac{- ( - 1 ) \pm 1}{2 \cdot 5}

将解分隔开

x_{1} = \frac{- ( - 1 ) + 1}{2 \cdot 5}, x_{2} = \frac{- ( - 1 ) - 1}{2 \cdot 5}

x = \frac{- ( - 1 ) + 1}{2 \cdot 5} : \frac{1}{5}

x = \frac{- ( - 1 ) - 1}{2 \cdot 5} : 0

二次方程组的解是:

x = \frac{1}{5}, x = 0

作图

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