To solve the expression [tex]\( 3 \sqrt{86} \)[/tex], let's break it down step-by-step:
1. Calculate the square root of 86:
- The square root of 86 is approximately 9.2736.
2. Multiply the square root of 86 by 3:
- Now, we multiply 3 by the approximate value of the square root of 86.
- [tex]\( 3 \times 9.2736 \approx 27.8209 \)[/tex]
Therefore, [tex]\( 3 \sqrt{86} \approx 27.8209 \)[/tex].