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受欢迎的代数 >

x^2+13x-10=0

解答

x^{2} + 13 x - 10 = 0

解答

x = \frac{- 13 + 209}{2}, x = \frac{- 13 - 209}{2}

+1

十进制

x = 0.72841 \dots, x = - 13.72841 \dots

求解步骤

x^{2} + 13 x - 10 = 0

使用求根公式求解

x_{1, 2} = \frac{- 13 \pm 1 3 ^{2} - 4 \cdot 1 \cdot ( - 10 )}{2 \cdot 1}

1 3^{2} - 4 \cdot 1 \cdot (- 10) = 209

x_{1, 2} = \frac{- 13 \pm 209}{2 \cdot 1}

将解分隔开

x_{1} = \frac{- 13 + 209}{2 \cdot 1}, x_{2} = \frac{- 13 - 209}{2 \cdot 1}

x = \frac{- 13 + 209}{2 \cdot 1} : \frac{- 13 + 209}{2}

x = \frac{- 13 - 209}{2 \cdot 1} : \frac{- 13 - 209}{2}

二次方程组的解是:

x = \frac{- 13 + 209}{2}, x = \frac{- 13 - 209}{2}

作图

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