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Popular >

x-sqrt(21-4x)=0

Solution

x - 21 - 4 x = 0

Solution

x = 3

Solution steps

x - 21 - 4 x = 0

Remove square roots

21 - 4 x = x^{2}

Solve

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

x = 3, x = - 7

Verify Solutions:

x = 3

True

, x = - 7

False

The solution is

x = 3

Popular Examples

sqrt(m)=-3,3x^2-15x+2m=0

m = - 3, 3 x^{2} - 15 x + 2 m = 0

sqrt(x)=3sqrt(4)

x = 34

(x^2+72)^{1/2}=9

(x^{2} + 72)^{\frac{1}{2}} = 9

sqrt(x+1)-sqrt(x-6)=1

x + 1 - x - 6 = 1

x^{0.2}(d-6)=0.3d+5-3+0.1d

x^{0.2} (d - 6) = 0.3 d + 5 - 3 + 0.1 d

Frequently Asked Questions (FAQ)

What is the answer to x-sqrt(21-4x)=0 ?
The answer to x-sqrt(21-4x)=0 is x=3
Solve for x: x-sqrt(21-4x)=0
The solution is x=3