Subtract 11√19 − -5√19

To subtract these two terms, we can simply combine the terms that have the same radical, which in this case is √19.

11√19 - (-5√19)
= 11√19 + 5√19

When we add these two terms, we get:

(11 + 5)√19
= 16√19

Therefore, 11√19 - (-5√19) = 16√19.