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 >

2x^2=14x

解答

2 x^{2} = 14 x

解答

x = 0, x = 7

求解步骤

2 x^{2} = 14 x

将

14 x

para o lado esquerdo

2 x^{2} - 14 x = 0

因式分解

2 x^{2} - 14 x : 2 x (x - 7)

2 x (x - 7) = 0

使用零因数法则： If

ab = 0

then

a = 0

or

b = 0

x = 0 or x - 7 = 0

解

x - 7 = 0 : x = 7

二次方程组的解是:

x = 0, x = 7

作图

流行的例子

solvefor t,f=29-(x^2+z^2+t^2)

so l v e f or t, f = 29 - (x^{2} + z^{2} + t^{2})

completesquare 3x^2-6x+10

co m pl e t es q u a re 3 x^{2} - 6 x + 10

solvefor x,x^2-3x+2=0

so l v e f or x, x^{2} - 3 x + 2 = 0

x^{2} + 3 = 7

1/5 m^2+2/5 m+2=0

\frac{1}{5} m^{2} + \frac{2}{5} m + 2 = 0