JAMB - Mathematics (2010 - No. 2)

Rationalize \(\frac{2\sqrt{3} + \sqrt{5}}{\sqrt{5} - \sqrt{3}}\)
(3 √ 15 +11) / 2
3 √ 15 -11
(3 √ 15 -11) / 2
3 √ 15 +11

Explanation

\(\frac{2\sqrt{3} + \sqrt{5}}{\sqrt{5} - \sqrt{3}}\)

= \((\frac{2\sqrt{3} + \sqrt{5}}{\sqrt{5} - \sqrt{3}})(\frac{\sqrt{5} + \sqrt{3}}{\sqrt{5} + \sqrt{3}})\)

= \(\frac{2\sqrt{15} + 6 + 5 + \sqrt{15}}{5 - 3}\)

= \(\frac{3\sqrt{15} + 11}{2}\)

 

 

 

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