[tex]3 \sqrt{ {x}^{12} } \times 2 \sqrt{ {x}^{6} } [/tex]

[tex]3 \sqrt{x {}^{12} } \times 2 \sqrt{x {}^{6} } \\ 6 \sqrt{x {}^{12 + 6} } \\ 6 \sqrt{x {}^{18} } \\ x {}^{18 \div 6} \\ x {}^{3} [/tex]
moga ga Salah:)