SOLUTION: (5radical3-10radical2)*(4radical3+8radical2)
so far i have 20(radical3)^2-40 radical3* radical2-40 radical2*radical3-80(radical2)^2
next 20*3-40 radical6-40 radical6-80*2
no
Algebra.Com
Question 323554:  (5radical3-10radical2)*(4radical3+8radical2)
so far i have 20(radical3)^2-40 radical3* radical2-40 radical2*radical3-80(radical2)^2
next 20*3-40 radical6-40 radical6-80*2
not sure what to do after this? 
Answer by stanbon(75887)   (Show Source): You can put this solution on YOUR website!
 (5radical3-10radical2)*(4radical3+8radical2) 
-----------------------
(5sqrt(3) - 10sqrt(2))*(4sqrt(3) + 8 sqrt(2)
---
Use FOIL to get:
F: 20*3
O: 40sqrt(6)
I: -40sqrt(6)
L: -80*2
---
Combine to get: 60-160 = -100
================================
Cheers,
Stan H. 
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