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

Mathematics
JAMB 2010

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

  • A. (3 √ 15 +11) / 2
  • B. 3 √ 15 -11
  • C. (3 √ 15 -11) / 2
  • D. 3 √ 15 +11
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Correct Answer: Option A
Explanation

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

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

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

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

 

 

 

There is an explanation video available below.


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Explanation Video

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WAEC May/June 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 99995
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WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709