Question 445110
multiply!! 
(5-4 √10) (3√5-2) 
simplify as much as possible!
the √ signs are square root signs.
thanks so much!!
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Remember FOIL, First, Outside, Inside, Last ?
(5-4√10)(3√5-2)
=15√5-10-12√50+8√10
=15√5-10-12√(2*25)+8√10
=15√5-10-12*5√2+8√10
=15√5-10-60√2+8√10 (ans)