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受欢迎的代数 >

2x^2+12x-10=0

解答

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

解答

x = - 3 + 14, x = - 3 - 14

+1

十进制

x = 0.74165 \dots, x = - 6.74165 \dots

求解步骤

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

使用求根公式求解

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

1 2^{2} - 4 \cdot 2 (- 10) = 414

x_{1, 2} = \frac{- 12 \pm 4 14}{2 \cdot 2}

将解分隔开

x_{1} = \frac{- 12 + 4 14}{2 \cdot 2}, x_{2} = \frac{- 12 - 4 14}{2 \cdot 2}

x = \frac{- 12 + 4 14}{2 \cdot 2} : - 3 + 14

x = \frac{- 12 - 4 14}{2 \cdot 2} : - 3 - 14

二次方程组的解是:

x = - 3 + 14, x = - 3 - 14

作图

流行的例子

solvefor x,g=p(x-q)^2+r-3

so l v e f or x, g = p (x - q)^{2} + r - 3

x^{2} - 242 = 0

- 6 x^{2} + 36 x - 84 = 0

solvefor x,f(x+2)=4x^2+5

so l v e f or x, f (x + 2) = 4 x^{2} + 5

9 x^{2} + 9 x - 1 = 0