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受欢迎的代数 >

12x^2+7x-10=0

解答

12 x^{2} + 7 x - 10 = 0

解答

x = \frac{2}{3}, x = - \frac{5}{4}

+1

十进制

x = 0.66666 \dots, x = - 1.25

求解步骤

12 x^{2} + 7 x - 10 = 0

使用求根公式求解

x_{1, 2} = \frac{- 7 \pm 7 ^{2} - 4 \cdot 12 ( - 10 )}{2 \cdot 12}

7^{2} - 4 \cdot 12 (- 10) = 23

x_{1, 2} = \frac{- 7 \pm 23}{2 \cdot 12}

将解分隔开

x_{1} = \frac{- 7 + 23}{2 \cdot 12}, x_{2} = \frac{- 7 - 23}{2 \cdot 12}

x = \frac{- 7 + 23}{2 \cdot 12} : \frac{2}{3}

x = \frac{- 7 - 23}{2 \cdot 12} : - \frac{5}{4}

二次方程组的解是:

x = \frac{2}{3}, x = - \frac{5}{4}

作图

流行的例子

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6 y^{2} + 7 y - 20 = 0

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