Question

Rationalise the denominator
1/root 7 - 2
Note- 7 is in under root but 2 is not.

Answer 1

Hi friend ✋✋✋✋
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Your answer
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★ RATIONALISATION
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$\frac{1}{ \sqrt{7} - 2 } \\ \\ = > \frac{1}{( \sqrt{7} - 2 ) } \times \frac{1}{ (\sqrt{7} + 2) } \\ \\ = > \frac{1}{( \sqrt{7}) {}^{2} - (2) {}^{2} } \\ \\ = > \frac{1}{7 - 4} \\ \\ = > \frac{1}{3}$
HOPE IT HELPS