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受欢迎的代数 >

12x^2+6x-9=x-6

解答

12 x^{2} + 6 x - 9 = x - 6

解答

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

+1

十进制

x = 0.33333 \dots, x = - 0.75

求解步骤

12 x^{2} + 6 x - 9 = x - 6

将

6

para o lado esquerdo

12 x^{2} + 6 x - 3 = x

将

x

para o lado esquerdo

12 x^{2} + 5 x - 3 = 0

使用求根公式求解

x_{1, 2} = \frac{- 5 \pm 5 ^{2} - 4 \cdot 12 ( - 3 )}{2 \cdot 12}

5^{2} - 4 \cdot 12 (- 3) = 13

x_{1, 2} = \frac{- 5 \pm 13}{2 \cdot 12}

将解分隔开

x_{1} = \frac{- 5 + 13}{2 \cdot 12}, x_{2} = \frac{- 5 - 13}{2 \cdot 12}

x = \frac{- 5 + 13}{2 \cdot 12} : \frac{1}{3}

x = \frac{- 5 - 13}{2 \cdot 12} : - \frac{3}{4}

二次方程组的解是:

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

作图

流行的例子

m^{2} + 4 m + 85 = 0

5((1+3y)/2)^2+9y^2=6

5 (\frac{1 + 3 y}{2})^{2} + 9 y^{2} = 6

因式分解 3x^2-6x-9=0

f a c t or 3 x^{2} - 6 x - 9 = 0

- 3 x^{2} - x + 5 = 0

solvefor x,x^2y-2xy+y-x=0

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