To simplify the expression \( x^2 + 5x + 6x + 2 \), we can combine like terms.
First, let's combine the \( x \) terms:
\[ 5x + 6x = 11x \]
Now we can rewrite the expression:
\[ x^2 + 11x + 2 \]
This is already in standard form, which is typically written as:
\[ ax^2 + bx + c \]
Thus, the simplified expression is:
\[ \boxed{x^2 + 11x + 2} \]