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Popular >

sqrt(x+21)=x+9

Solution

x + 21 = x + 9

Solution

x = - 5

Solution steps

x + 21 = x + 9

Square both sides:

x + 21 = x^{2} + 18 x + 81

x + 21 = x^{2} + 18 x + 81

Solve

x + 21 = x^{2} + 18 x + 81 : x = - 5, x = - 12

x = - 5, x = - 12

Verify Solutions:

x = - 5

True

, x = - 12

False

The solution is

x = - 5

Popular Examples

5sqrt(7x+4)-2=8

5 7 x + 4 - 2 = 8

k^{\frac{3}{2}} = 8

2 - 5 x = 3

z - 5 z = 6

sqrt(12x+22)-sqrt(8x+34)=-1

12 x + 22 - 8 x + 34 = - 1

Frequently Asked Questions (FAQ)

What is the answer to sqrt(x+21)=x+9 ?
The answer to sqrt(x+21)=x+9 is x=-5
Solve for x: sqrt(x+21)=x+9
The solution is x=-5