Respuesta :

[tex] \sqrt{8 x^{12} y^{7} } = \sqrt{8} \sqrt{x^{12}} \sqrt{ y^{6}*y } =\sqrt{4} \sqrt{2} \sqrt{(x^{6} )^{2} } \sqrt{ (y^{3})^{2}} \sqrt{y}=2 \sqrt{2} x^{6} y^{3} \sqrt{y} [/tex]

I hope it helps you :)