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受欢迎的代数 >

6x^2+28x-2=2x-10

解答

6 x^{2} + 28 x - 2 = 2 x - 10

解答

x = - \frac{1}{3}, x = - 4

+1

十进制

x = - 0.33333 \dots, x = - 4

求解步骤

6 x^{2} + 28 x - 2 = 2 x - 10

将

10

para o lado esquerdo

6 x^{2} + 28 x + 8 = 2 x

将

2 x

para o lado esquerdo

6 x^{2} + 26 x + 8 = 0

使用求根公式求解

x_{1, 2} = \frac{- 26 \pm 2 6 ^{2} - 4 \cdot 6 \cdot 8}{2 \cdot 6}

2 6^{2} - 4 \cdot 6 \cdot 8 = 22

x_{1, 2} = \frac{- 26 \pm 22}{2 \cdot 6}

将解分隔开

x_{1} = \frac{- 26 + 22}{2 \cdot 6}, x_{2} = \frac{- 26 - 22}{2 \cdot 6}

x = \frac{- 26 + 22}{2 \cdot 6} : - \frac{1}{3}

x = \frac{- 26 - 22}{2 \cdot 6} : - 4

二次方程组的解是:

x = - \frac{1}{3}, x = - 4

作图

流行的例子

x^{2} - 13 = - 4

completesquare x^2-6x+34=0

co m pl e t es q u a re x^{2} - 6 x + 34 = 0

x^{2} - 10 x + 9 = 10

-16x^2+29x-12=0

- 16 x^{2} + 29 x - 12 = 0

3x^2-8x-1=-6x+4

3 x^{2} - 8 x - 1 = - 6 x + 4