can you help me with this problem

Answer:
Step-by-step explanation:
[tex] \sqrt{49 {x}^{12} {y}^{8} } [/tex]
[tex] \sqrt{ {7}^{2} } \sqrt{ {x}^{12} } \sqrt{ {y}^{8} } [/tex]
[tex]7 ^{ \frac{1}{2} \times 2 } \times {x}^{ \frac{1}{2} \times 12 } \times {y}^{ \frac{1}{2} \times 8 } [/tex]
[tex]7 {x}^{6} {y}^{4} [/tex]