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 >

2c^2-4c=4

解答

2 c^{2} - 4 c = 4

解答

c = 1 + 3, c = 1 - 3

+1

十进制

c = 2.73205 \dots, c = - 0.73205 \dots

求解步骤

2 c^{2} - 4 c = 4

将

4

para o lado esquerdo

2 c^{2} - 4 c - 4 = 0

使用求根公式求解

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

(- 4)^{2} - 4 \cdot 2 (- 4) = 43

c_{1, 2} = \frac{- ( - 4 ) \pm 4 3}{2 \cdot 2}

将解分隔开

c_{1} = \frac{- ( - 4 ) + 4 3}{2 \cdot 2}, c_{2} = \frac{- ( - 4 ) - 4 3}{2 \cdot 2}

c = \frac{- ( - 4 ) + 4 3}{2 \cdot 2} : 1 + 3

c = \frac{- ( - 4 ) - 4 3}{2 \cdot 2} : 1 - 3

二次方程组的解是:

c = 1 + 3, c = 1 - 3

作图

流行的例子

因式分解 x^2+4x=12

f a c t or x^{2} + 4 x = 12

x^{2} + 18 x - 111 = 0

3x(4x+5)=7(4x+5)

3 x (4 x + 5) = 7 (4 x + 5)

w^{2} - 25 = 0

5 x^{2} - 15 x + 9 = 0