Question 32999
( sqrt(3) - sqrt(5) )( sqrt(3) - sqrt(5) )
( sqrt(3) - sqrt(5) )^2
<font color=blue>(a - b)^2= a^2 - 2ab + b^2</font>
sqrt(3)^2 -2( sqrt(3) sqrt(5) ) + sqrt(5)^2
3 - 2 sqrt(15) + 5
8 - 2 sqrt(15)