To divide \( 86\sqrt{2} \) by \( 2 \), we can simplify it as follows:
\[ \frac{86\sqrt{2}}{2} = 43\sqrt{2} \]
So the exact answer is \( 43\sqrt{2} \).
If we look at the provided responses, it appears that none of the options listed correspond exactly to \( 43\sqrt{2} \). The closest match in terms of numerical value is likely \( 43-\sqrt{ }\), but note that it should actually read \( 43\sqrt{2} \).
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