Question 200110
-4sqrt5(1-2sqrt5+sqrt15)
---
= -4sqrt(5) + 8*sqrt(25) - 4sqrt(75)
---
= -4sqrt(5) + 8*5 - 4*5sqrt(3)
---
= -4sqrt(5) + 40 - 20sqrt(3)
================================
Cheers,
Stan H.