To simplify the expression \( 9(712) + 3(712) \), we can factor out \( 712 \):
\[ 9(712) + 3(712) = (9 + 3)(712) = 12(712) \]
Now, we can evaluate \( 12(712) \):
\[ 12(712) = 8544 \]
Now, none of the provided responses appear to relate to the simplified numerical expression of \( 8544 \). It seems like there was some confusion about the expressions involving square roots and the numbers to compute.
If you meant the expression involving square roots directly (which in this case does not relate), please clarify so I can assist you accordingly!