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Popular >

x=sqrt(4x+21)

Solution

x = 4 x + 21

Solution

x = 7

Solution steps

x = 4 x + 21

Square both sides:

x^{2} = 4 x + 21

x^{2} = 4 x + 21

Solve

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

x = 7, x = - 3

Verify Solutions:

x = 7

True

, x = - 3

False

The solution is

x = 7

Popular Examples

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sqrt(x-16)-sqrt(x+8)+4=0

x - 16 - x + 8 + 4 = 0

2+sqrt(x-7)=sqrt(x+44)

2 + x - 7 = x + 44

4+sqrt(x^2-x-2)=x^2-x

4 + x^{2} - x - 2 = x^{2} - x

Frequently Asked Questions (FAQ)

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