Answer:
[tex]3c\sqrt{26c}[/tex]
Step-by-step explanation:
[tex]\sqrt{(234c^3)}\\\\=\sqrt{2*3^2*13c^3} \\\\=\sqrt{(3^2c^2)(2*13c)} \\\\=\sqrt{3^2c^2} \sqrt{2*13c} \\\\=3c\sqrt{26c}[/tex]