Posted by **Anonymous** on Sunday, January 16, 2011 at 7:22pm.

solve for u, u=sqrt -u+6

u=-u+6

- algebra -
**helper**, Sunday, January 16, 2011 at 7:38pm
do you mean

u = (sqrt(-6 + u))

please use the word 'sqrt' and put in ()

what is included under the radical

we will be able to assist you much faster if what you need is more clear

thank you

- algebra -
**helper**, Sunday, January 16, 2011 at 7:56pm
u = (sqrt(-u + 6))

u = (sqrt(6 - u))

square both sides

u^2 = 6 - u

u^2 + u - 6

complete the square

u^2 + u = 6

u^2 + u + 1/4 = 6 + 1/4

(u + 1/2)^2 = 25/4

take the square root of both sides

+ - (u + 1/2) = 5/2

u + 1/2 = 5/2

u = 4/2 = 2

-u - 1/2 = 5/2

-u = 6/2 = 3

u = -3

check for u = 2

u = (sqrt(6 - u))

2 = (sqrt(6 - 2))

2 = sqrt 4

2 = 2

check for u = -3

u = (sqrt(6 - u))

-3 = (sqrt(6 + 3))

-3 = sqrt 9

-3 not = 3

so, the only solution is u = 2

## Answer this Question

## Related Questions

- Math Help please!! - Could someone show me how to solve these problems step by ...
- some algebra help (radicals) - I hope I am writing this down right.. I am trying...
- Inequality - When I solve the inquality 2x^2 - 6 < 0, I get x < + or - ...
- Algebra - Solve for s: h=(square root of 3)times s/2 and solve for h V= (pi)r ...
- Algebra 2: Radicals URGENT!! - Could some kind, saintly soul help me solve this ...
- algebra - can someone tell me if i did the problem correct (solve by completing ...
- Algebra 2 - Operations with Complex Numbers Simplify. 1. sqrt(-144) 2. sqrt(-64x...
- math - solve 2x^2+3x+8=0 and express the solutions in a+bi form. Let's use the ...
- Math/Calculus - Solve the initial-value problem. Am I using the wrong value for ...
- math,algebra,help - Directions are simplify by combining like terms. x radiacal ...