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受欢迎的代数 >

3x^2-6x=12x

解答

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

解答

x = 6, x = 0

求解步骤

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

将

12 x

para o lado esquerdo

3 x^{2} - 18 x = 0

使用求根公式求解

x_{1, 2} = \frac{- ( - 18 ) \pm ( - 18 ) ^{2} - 4 \cdot 3 \cdot 0}{2 \cdot 3}

(- 18)^{2} - 4 \cdot 3 \cdot 0 = 18

x_{1, 2} = \frac{- ( - 18 ) \pm 18}{2 \cdot 3}

将解分隔开

x_{1} = \frac{- ( - 18 ) + 18}{2 \cdot 3}, x_{2} = \frac{- ( - 18 ) - 18}{2 \cdot 3}

x = \frac{- ( - 18 ) + 18}{2 \cdot 3} : 6

x = \frac{- ( - 18 ) - 18}{2 \cdot 3} : 0

二次方程组的解是:

x = 6, x = 0

作图

流行的例子

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

completesquare 4+2x-x^2

co m pl e t es q u a re 4 + 2 x - x^{2}

3 x^{2} - 2 x = 21

2 r^{2} - r - 11 = - 3

6 x^{2} = - 8 x - 7