Answer:
3xy
Step-by-step explanation:
[tex] \huge \: 3 \sqrt{ {x}^{2} {y}^{2} } \\ \\ \huge \: = 3 \times \sqrt{ {x}^{2} } \times \sqrt{ {y}^{2} } \\ \\ \huge \: = 3 \times {x}^{2 \times \frac{1}{2} } \times {y}^{2 \times \frac{1}{2} } \\ \\ \huge \: = 3 \times x \times y \\ \\ \huge \: = 3xy \\ [/tex]
