Question

Rational denominator 1√7-2

Answer 1

Answer:

$\frac{1}{ \sqrt{7} - 2 } = \frac{1}{ \sqrt{7 } - 2 } \times \frac{ \sqrt{7 + 2} }{ \sqrt{7 + } + 2 } \\ = \frac{ \sqrt{7} + 2}{7 - 4} = \frac{ \sqrt{7} + 2 }{3}$