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受欢迎的代数 >

x^2+41x=-40

解答

x^{2} + 41 x = - 40

解答

x = - 1, x = - 40

求解步骤

x^{2} + 41 x = - 40

将

40

para o lado esquerdo

x^{2} + 41 x + 40 = 0

使用求根公式求解

x_{1, 2} = \frac{- 41 \pm 4 1 ^{2} - 4 \cdot 1 \cdot 40}{2 \cdot 1}

4 1^{2} - 4 \cdot 1 \cdot 40 = 39

x_{1, 2} = \frac{- 41 \pm 39}{2 \cdot 1}

将解分隔开

x_{1} = \frac{- 41 + 39}{2 \cdot 1}, x_{2} = \frac{- 41 - 39}{2 \cdot 1}

x = \frac{- 41 + 39}{2 \cdot 1} : - 1

x = \frac{- 41 - 39}{2 \cdot 1} : - 40

二次方程组的解是:

x = - 1, x = - 40

作图

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