Question: Rationalize the denominators and simplify: $\dfrac{5}{3\sqrt{7} + 2\sqrt{3}}$
Solution:
Given,
$= \dfrac{5}{3\sqrt{7} + 2\sqrt{3}}$
$= \dfrac{5}{3\sqrt{7} + 2\sqrt{3}} × \dfrac{3\sqrt{7} - 2\sqrt{3}}{3\sqrt{7} - 2\sqrt{3}}$
$= \dfrac{5(3\sqrt{7} - 2\sqrt{3})}{(3\sqrt{7})^2 - (2\sqrt{3})^2}$
$= \dfrac{5(3\sqrt{7} - 2\sqrt{3})}{63-12}$
$= \dfrac{5(3\sqrt{7} - 2\sqrt{3})}{51}$
$= \dfrac{5}{51} (3\sqrt{7} - 2\sqrt{3})$
= Answer
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