Question: Rationalize the denominators and simplify: $\dfrac{3}{\sqrt{5} - \sqrt{2}}$
Solution:
Given,
$= \dfrac{3}{\sqrt{5} - \sqrt{2}}$
$= \dfrac{3}{\sqrt{5} - \sqrt{2}} × \dfrac{\sqrt{5} + \sqrt{2}}{\sqrt{5} + \sqrt{2}}$
$= \dfrac{3(\sqrt{5} + \sqrt{2}}{(\sqrt{5})^2 - (\sqrt{2})^2}$
$= \dfrac{3(\sqrt{5} + \sqrt{2})}{(5-2)}$
$= \dfrac{3(\sqrt{5} + \sqrt{2})}{3}$
$= \sqrt{5} + \sqrt{2}$
= Answer
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