en

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Popular >

sqrt(21+4x)=x

Solution

21 + 4 x = x

Solution

x = 7

Solution steps

21 + 4 x = x

Square both sides:

21 + 4 x = x^{2}

21 + 4 x = x^{2}

Solve

21 + 4 x = x^{2} : x = 7, x = - 3

x = 7, x = - 3

Verify Solutions:

x = 7

True

, x = - 3

False

The solution is

x = 7

Popular Examples

sqrt(x)-1=sqrt(5-x)

x - 1 = 5 - x

x - 5 = x - 3

1-sqrt(x)=(x-1)^2

1 - x = (x - 1)^{2}

2(x+1)=sqrt(3-x)+2

2 (x + 1) = 3 - x + 2

2 x + x = 1

Frequently Asked Questions (FAQ)

What is the answer to sqrt(21+4x)=x ?
The answer to sqrt(21+4x)=x is x=7
Solve for x: sqrt(21+4x)=x
The solution is x=7