SOLUTION: multiply sqrt (5) + sqrt (3) x sqrt (5) - sqrt (3). please help solve this equation. thank you

Algebra ->  Square-cubic-other-roots -> SOLUTION: multiply sqrt (5) + sqrt (3) x sqrt (5) - sqrt (3). please help solve this equation. thank you      Log On


   

Question 610473: multiply
sqrt (5) + sqrt (3) x sqrt (5) - sqrt (3). please help solve this equation.
thank you
Found 2 solutions by jim_thompson5910, Alan3354:
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
If it's %28sqrt%285%29%2Bsqrt%283%29%29%28sqrt%285%29-sqrt%283%29%29, let x=sqrt%285%29 and y=sqrt%283%29 to get %28x%2By%29%28x-y%29

Then FOIL out %28x%2By%29%28x-y%29 to see what you get.

Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
multiply
sqrt (5) + sqrt (3) x sqrt (5) - sqrt (3). please help solve this equation.
thank you
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It's not an equation.
I can tell - there's no equal sign.
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I think this is what you want to do:
%28sqrt+%285%29+%2B+sqrt+%283%29%29%2A%28sqrt+%285%29+-+sqrt+%283%29%29
That's product of the sum and difference.
%28a%2Bb%29%2A%28a-b%29+=+a%5E2+-+b%5E2
--------
%28sqrt+%285%29+%2B+sqrt+%283%29%29%2A%28sqrt+%285%29+-+sqrt+%283%29%29
= %28sqrt%285%29%29%5E2+-+%28sqrt%283%29%29%5E2+=+5+-+3
= 2
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Use the asterisk for multiply. x is used for other things.