Answer:
B. 4x²
Step-by-step explanation:
You want the simplified form of √(6x³)/√(3x) • √(8x²).
Common factors can be canceled and perfect squares removed from under the radical.
[tex]\dfrac{\sqrt{6x^3}}{\sqrt{3x}}\times\sqrt{8x^2}=\sqrt{\dfrac{(6x^3)(8x^2)}{3x}}=\sqrt{\dfrac{48x^5}{3x}}=\sqrt{16x^4}\\\\\\=\sqrt{(4x^2)^2}=\boxed{4x^2}\qquad\text{matches choice B}[/tex]