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受欢迎的代数 >

6x^2+8x-5=0

解答

6 x^{2} + 8 x - 5 = 0

解答

x = \frac{- 4 + 46}{6}, x = - \frac{4 + 46}{6}

+1

十进制

x = 0.46372 \dots, x = - 1.79705 \dots

求解步骤

6 x^{2} + 8 x - 5 = 0

使用求根公式求解

x_{1, 2} = \frac{- 8 \pm 8 ^{2} - 4 \cdot 6 ( - 5 )}{2 \cdot 6}

8^{2} - 4 \cdot 6 (- 5) = 246

x_{1, 2} = \frac{- 8 \pm 2 46}{2 \cdot 6}

将解分隔开

x_{1} = \frac{- 8 + 2 46}{2 \cdot 6}, x_{2} = \frac{- 8 - 2 46}{2 \cdot 6}

x = \frac{- 8 + 2 46}{2 \cdot 6} : \frac{- 4 + 46}{6}

x = \frac{- 8 - 2 46}{2 \cdot 6} : - \frac{4 + 46}{6}

二次方程组的解是:

x = \frac{- 4 + 46}{6}, x = - \frac{4 + 46}{6}

作图

流行的例子

x^{2} + 9 x - 8 = 0

2 x^{2} + 40 = - 8 x

solvefor x,x^2+6x-4y^2+8y+5=0

so l v e f or x, x^{2} + 6 x - 4 y^{2} + 8 y + 5 = 0

2 x^{2} = 144

3x^2-24x+2=5x^2+1

3 x^{2} - 24 x + 2 = 5 x^{2} + 1