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Popular >

sqrt(4x+21)=x

Solution

4 x + 21 = x

Solution

x = 7

Solution steps

4 x + 21 = x

Square both sides:

4 x + 21 = x^{2}

4 x + 21 = x^{2}

Solve

4 x + 21 = 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^2-256)=0

x^{2} - 256 = 0

sqrt(4x+3)-sqrt(4x-1)=2

4 x + 3 - 4 x - 1 = 2

4 = x^{\frac{1}{2}}

8 x + 1 + 1 = x

sqrt(3x^2)+6x=0

3 x^{2} + 6 x = 0

Frequently Asked Questions (FAQ)

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