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# Simplifying a surd q watch

1. How do I work out 1/2 x ((root)490/2)) x (root)10? I've forgotten some of the surd rules I think, can you just ordinarily divide the root of 490 by 2? The answer is 17.5 but I don't understand how.
2. The main bit is the 490. Look at the factors of that and split it up. From there is gets quite easy.
3. (Original post by TenOfThem)
The forum guidelines ask that you do not give full solutions
Oh sorry. I didn't know; will delete it

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Updated: March 12, 2013
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