SOLUTION: I need help simplifying √4x^2/4b and solving (2+√5)(4-√10) thanks!!

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Question 197859: I need help simplifying √4x^2/4b
and solving (2+√5)(4-√10)
thanks!!
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
I need help simplifying √4x^2/4b
sqrt%284x%5E2%29%2F4b
= 2x/4b
= x/2b
-------------
and solving (2+√5)(4-√10)
There's nothing to solve for.
It can be multiplied
%282%2Bsqrt%285%29%29%2A%284-sqrt%2810%29%29
= 8+-2sqrt%2810%29+%2B+4sqrt%285%29+-+2sqrt%285%29
= 8+-+2sqrt%2810%29+%2B+2sqrt%285%29