2x(-sqrt(15)/3)x(-sqrt(6)/3) I put this in the calculator but I get this long decimal that when I put into a fraction calculator it doesn't know how to do it
2* ( - sqrt (15)/3) * ( -sqrt(6) /3) =
(2/9) * sqrt (15 * 6) =
(2/9) * sqrt ( 90) =
(2/9) * sqrt (9 * 10) =
(2/9)* sqrt(9) * sqrt(10) =
(2/9) * 3 * sqrt(10) =
(6/9) * sqrt(10) =
(2/3) * sqrt(10) =
[2 sqrt (10)] / 3
