zs

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

受欢迎的代数 >

a=2x+2x^2

解答

a = 2 x + 2 x^{2}

解答

x = \frac{- 1 + 2 a + 1}{2}, x = - \frac{2 a + 1 + 1}{2}

求解步骤

a = 2 x + 2 x^{2}

交换两边

2 x + 2 x^{2} = a

将

a

para o lado esquerdo

2 x + 2 x^{2} - a = 0

改写成标准形式

a x^{2} + b x + c = 0

2 x^{2} + 2 x - a = 0

使用求根公式求解

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

化简

2^{2} - 4 \cdot 2 (- a) : 2 1 + 2 a

x_{1, 2} = \frac{- 2 \pm 2 1 + 2 a}{2 \cdot 2}

将解分隔开

x_{1} = \frac{- 2 + 2 1 + 2 a}{2 \cdot 2}, x_{2} = \frac{- 2 - 2 1 + 2 a}{2 \cdot 2}

x = \frac{- 2 + 2 1 + 2 a}{2 \cdot 2} : \frac{- 1 + 2 a + 1}{2}

x = \frac{- 2 - 2 1 + 2 a}{2 \cdot 2} : - \frac{2 a + 1 + 1}{2}

二次方程组的解是:

x = \frac{- 1 + 2 a + 1}{2}, x = - \frac{2 a + 1 + 1}{2}

作图

流行的例子

0 = 5 - x^{2}

solvefor y,y+10y^2=24t

so l v e f or y, y + 10 y^{2} = 24 t

3q^2-120q+1000=0

3 q^{2} - 120 q + 1000 = 0

3/4 (-x^2+4x-3)=0

\frac{3}{4} (- x^{2} + 4 x - 3) = 0

2 x^{2} - 392 = 0