If a : b = \(\sqrt7 : \sqrt3\), then the value of (3a + 2b) : (3a – 2b) is equal to:
1
\(\frac{2 + \sqrt{21}}{(2 - \sqrt{21})}\)
2
\(\frac{2 + \sqrt{21}}{(-2 + \sqrt{21})}\)
3
\(\frac{2 - \sqrt{21}}{(2 + \sqrt{21})}\)
4
More than one of the above
5
None of the above