SOLUTION: solve: 4 sqrt (x) = 8 + 2 sqrt (x) a) (16) b) none or 0 c) (4) d)(-4)

Algebra ->  Square-cubic-other-roots -> SOLUTION: solve: 4 sqrt (x) = 8 + 2 sqrt (x) a) (16) b) none or 0 c) (4) d)(-4)      Log On


   

Question 316197: solve: 4 sqrt (x) = 8 + 2 sqrt (x)
a) (16)
b) none or 0
c) (4)
d)(-4)
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
+4+sqrt+%28x%29+=+8+%2B+2+sqrt+%28x%29+
Let u=sqrt%28x%29
, then
+4u=8%2B2u
+2u=8
+u=8
+sqrt%28x%29=8
+x=64
None of the above.
b) is the closest answer.