Multiply, and then simplify if possible. \( 9(\sqrt{6}-7) \) \( 9(\sqrt{6}-7)=\square \) (Simplify your answer. Type an exact answer, using radicals as needed.)

To multiply \( 9(\sqrt{6}-7) \), distribute the \( 9 \) to both terms inside the parentheses: \[ 9 \cdot \sqrt{6} - 9 \cdot 7 = 9\sqrt{6} - 63 \] Therefore, the simplified answer is: \[ 9(\sqrt{6}-7)=9\sqrt{6} - 63 \]