Posted by Anonymous on Sunday, January 16, 2011 at 7:22pm.
solve for u, u=sqrt u+6
u=ãu+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  Evaluate sqrt7x (sqrt x7 sqrt7) Show your work. sqrt(7)*sqrt(x)sqrt(...
 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 initialvalue problem. Am I using the wrong value for ...
More Related Questions