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受欢迎的代数 >

x^2-2/5*x+1/25 =0

解答

x^{2} - \frac{2}{5} \cdot x + \frac{1}{25} = 0

解答

x = \frac{1}{5}

+1

十进制

x = 0.2

求解步骤

x^{2} - \frac{2}{5} x + \frac{1}{25} = 0

找到

5, 25

的最小公倍数:

25

乘以最小公倍数=

25

x^{2} \cdot 25 - \frac{2}{5} x \cdot 25 + \frac{1}{25} \cdot 25 = 0 \cdot 25

化简

25 x^{2} - 10 x + 1 = 0

使用求根公式求解

x_{1, 2} = \frac{- ( - 10 ) \pm ( - 10 ) ^{2} - 4 \cdot 25 \cdot 1}{2 \cdot 25}

(- 10)^{2} - 4 \cdot 25 \cdot 1 = 0

x_{1, 2} = \frac{- ( - 10 ) \pm 0}{2 \cdot 25}

x = \frac{- ( - 10 )}{2 \cdot 25}

\frac{- ( - 10 )}{2 \cdot 25} = \frac{1}{5}

x = \frac{1}{5}

二次方程组的解是:

x = \frac{1}{5}

作图

流行的例子

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(63*4)/(8+4.5)=(x)^2

\frac{63 \cdot 4}{8 + 4.5} = (x)^{2}

9 a^{2} - 8 a - 20 = 0

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