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受欢迎的代数 >

x^2-10x+4=3

解答

x^{2} - 10 x + 4 = 3

解答

x = 5 + 26, x = 5 - 26

+1

十进制

x = 9.89897 \dots, x = 0.10102 \dots

求解步骤

x^{2} - 10 x + 4 = 3

将

3

para o lado esquerdo

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

使用求根公式求解

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

(- 10)^{2} - 4 \cdot 1 \cdot 1 = 46

x_{1, 2} = \frac{- ( - 10 ) \pm 4 6}{2 \cdot 1}

将解分隔开

x_{1} = \frac{- ( - 10 ) + 4 6}{2 \cdot 1}, x_{2} = \frac{- ( - 10 ) - 4 6}{2 \cdot 1}

x = \frac{- ( - 10 ) + 4 6}{2 \cdot 1} : 5 + 26

x = \frac{- ( - 10 ) - 4 6}{2 \cdot 1} : 5 - 26

二次方程组的解是:

x = 5 + 26, x = 5 - 26

作图

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