SOLUTION: Simplify 3√10 + 7√15 - 6√10 - 4√15 I know that first I need to combine like terms.. but is it possible to have a negative radical? Here are my steps s

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Question 920513: Simplify 3√10 + 7√15 - 6√10 - 4√15
I know that first I need to combine like terms.. but is it possible to have a negative radical?
Here are my steps so far:
-3√10 + 3√15
So now, is this the solution above? ^ It is simplified, however my question is multiple choice, and none of the answers have this answer.

Answer by richwmiller(17219)   (Show Source): You can put this solution on YOUR website!
"none of the answers have this answer"
What are the choices?

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