(4 + root 3) (5 - 3 root 6) simplified
(4 + √3)*(5 - 3√6) =
20 + 5√3 - 12√6 - 3√18 =
20 + 5√3 - 12√6 - 3√(9*2) =
20 + 5√3 - 12√6 - 9√2