Question 54739
{{{ A = l * w }}}
{{{ A = (sqrt(3)+ sqrt(5))(sqrt(3)+ sqrt(5)) }}}
FOIL
F: rt3 * rt3 = 3
O: rt3 * rt5 = rt15
I: rt3 * rt5 = rt15
L: rt5 * rt5 = 5
Add like terms
{{{ A = 3 + sqrt(15) + sqrt(15) + 5 }}}
{{{ A = 8 + 2sqrt(15) }}}