To subtract the two expressions, you can combine like terms.
Starting with the expression:
\[ 11\sqrt{19} - 5\sqrt{19} \]
You can factor out \(\sqrt{19}\):
\[ (11 - 5)\sqrt{19} \]
Now, perform the subtraction:
\[ 6\sqrt{19} \]
So, the result of \( 11\sqrt{19} - 5\sqrt{19} \) is \( 6\sqrt{19} \).