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受欢迎的代数 >

x^2+6x+1=-2x+1

解答

x^{2} + 6 x + 1 = - 2 x + 1

解答

x = 0, x = - 8

求解步骤

x^{2} + 6 x + 1 = - 2 x + 1

将

1

para o lado esquerdo

x^{2} + 6 x = - 2 x

将

2 x

para o lado esquerdo

x^{2} + 8 x = 0

使用求根公式求解

x_{1, 2} = \frac{- 8 \pm 8 ^{2} - 4 \cdot 1 \cdot 0}{2 \cdot 1}

8^{2} - 4 \cdot 1 \cdot 0 = 8

x_{1, 2} = \frac{- 8 \pm 8}{2 \cdot 1}

将解分隔开

x_{1} = \frac{- 8 + 8}{2 \cdot 1}, x_{2} = \frac{- 8 - 8}{2 \cdot 1}

x = \frac{- 8 + 8}{2 \cdot 1} : 0

x = \frac{- 8 - 8}{2 \cdot 1} : - 8

二次方程组的解是:

x = 0, x = - 8

作图

流行的例子

2 p^{2} - 7 p = 5

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A(x)=x^2+(sqrt(3))/4 (2/3-4/3 x)^2

A (x) = x^{2} + \frac{3}{4} (\frac{2}{3} - \frac{4}{3} x)^{2}

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