SOLUTION: multiply and simplify: (√5+ 4)(√5- 1)

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Question 318725: multiply and simplify:
(√5+ 4)(√5- 1)
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Use the FOIL method,
%28sqrt%285%29%2B4%29%28sqrt%285%29-1%29=5-sqrt%285%29%2B4sqrt%285%29-4
%28sqrt%285%29%2B4%29%28sqrt%285%29-1%29=1%2B3sqrt%285%29