When you distribute you should get

Simplify to get

Answer 2 is correct
The answer is the positive square root of 36
Suppose that a>b>1, then
and 
Therefore, since 2<3<7, 
Choose an arbitrary x>1. You have that a takes the greatest values at x, c takes the smallest value at x. Thus,
a>b>c and
Answer: correct option is B.
Answer:
LOPHOPHORE: Ciliated feeding structure, ring of hollow tentacles around mouth, extension of the metacoel, functions in feeding respiration, lateral cilia create water current, frontal cilia transport food to mouth.