Answer:
C. 4x^4√5 + ...
Step-by-step explanation:
For a problem like this, it often saves time to find the leading term of the answer. Here, that tells you the correct answer choice.
The product of the first terms of the binomial factors is ...
[tex]\sqrt{2x^3}\cdot2\sqrt{10x^5}=2\sqrt{2x^3\cdot10x^5}=2\sqrt{20x^8}=\boxed{4x^4\sqrt{5}}[/tex]
This is sufficient to identify the 3rd choice as the correct one.
