## Algebra: A Combined Approach (4th Edition)

$\frac{\sqrt 21}{3}$
Step 1: $\sqrt \frac{7}{3}$ Step 2: $\frac{\sqrt 7}{\sqrt 3}$ Step 3: To rationalize the denominator, we multiply the numerator and denominator by a factor that makes the radicand in the denominator a perfect square. Step 4: $\frac{\sqrt 7\times\sqrt 3}{\sqrt 3\times\sqrt 3}$ Step 5: $\frac{\sqrt 21}{3}$