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受欢迎的代数 >

x^2+10x-36=0

解答

x^{2} + 10 x - 36 = 0

解答

x = - 5 + 61, x = - 5 - 61

+1

十进制

x = 2.81024 \dots, x = - 12.81024 \dots

求解步骤

x^{2} + 10 x - 36 = 0

使用求根公式求解

x_{1, 2} = \frac{- 10 \pm 1 0 ^{2} - 4 \cdot 1 \cdot ( - 36 )}{2 \cdot 1}

1 0^{2} - 4 \cdot 1 \cdot (- 36) = 261

x_{1, 2} = \frac{- 10 \pm 2 61}{2 \cdot 1}

将解分隔开

x_{1} = \frac{- 10 + 2 61}{2 \cdot 1}, x_{2} = \frac{- 10 - 2 61}{2 \cdot 1}

x = \frac{- 10 + 2 61}{2 \cdot 1} : - 5 + 61

x = \frac{- 10 - 2 61}{2 \cdot 1} : - 5 - 61

二次方程组的解是:

x = - 5 + 61, x = - 5 - 61

作图

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