SOLUTION: (5square root[2] + 2square root[3])(square root[2] - 2square root[3]) Please multiply these out and show steps. I wasn't sure how to do the square root symbol in here

Algebra ->  Radicals -> SOLUTION: (5square root[2] + 2square root[3])(square root[2] - 2square root[3]) Please multiply these out and show steps. I wasn't sure how to do the square root symbol in here      Log On


   

Question 195954: (5square root[2] + 2square root[3])(square root[2] - 2square root[3]) Please multiply these out and show steps. I wasn't sure how to do the square root symbol in here
Answer by RAY100(1637) About Me  (Show Source):
You can put this solution on YOUR website!
(5sqrt2 +2sqrt3) ( sqrt2 -2sqrt3)
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use F O I L
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5 sqrt2 sqrt2 - 5*2 sqrt2 sqrt3 +2sqrt3 sqrt2 -2*2sqrt3 sqrt3
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5*2 -10 sqrt6 +2 sqrt6 -4 *3
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10 -8sqrt6 -12
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-2 -8 sqrt6
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checking
using calculator,,original = -21.6,,,answer = -21.6,,,,ok