## ASVAB Arithmetic Reasoning Practice Test 338548

Question 2 of 5
To multiply or divide radicals, multiply or divide the coefficients and radicands separately: $$x\sqrt{a} \times y\sqrt{b} = xy\sqrt{ab}$$ and $${x\sqrt{a} \over y\sqrt{b}} = {x \over y}\sqrt{a \over b}$$
What is 3$$\sqrt{3}$$ x 9$$\sqrt{7}$$?
 27$$\sqrt{7}$$ 27$$\sqrt{21}$$ 12$$\sqrt{7}$$ 12$$\sqrt{3}$$