Question 234874
{{{(sqrt(6) + 1)(3*sqrt(6) + 1)}}}
Just use FOIL (First, Outside, Inside, Last):
{{{sqrt(6)*3sqrt(6) + sqrt(6)*1 + 1*3*sqrt(6) + 1*1)}}}
Simplifying we get:
{{{3*(sqrt(6))^2 + sqrt(6) + 3sqrt(6) + 1}}}
{{{3*6 + 4sqrt(6) + 1}}}
{{{18 + 4sqrt(6) + 1}}}
{{{19 + 4sqrt(6)}}}