Evaluate \[\sqrt{5 + \sqrt{21}} + \sqrt{5 - \sqrt{21}}.\]
Question:
Evaluate \[\sqrt{5 + \sqrt{21}} + \sqrt{5 - \sqrt{21}}.\]
Answer:
Let's think step by step.

user
\sqrt{14}
Evaluate \[\sqrt{5 + \sqrt{21}} + \sqrt{5 - \sqrt{21}}.\]
train