ASVAB Arithmetic Reasoning Practice Test 2780

Question 1 of 5
Multiplying & Dividing Radicals

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 \( \frac{12\sqrt{21}}{6\sqrt{3}} \)?

2 \( \sqrt{\frac{1}{7}} \)
2 \( \sqrt{7} \)
\(\frac{1}{7}\) \( \sqrt{2} \)
7 \( \sqrt{2} \)