Question

Tell the all 1 to 4 answers with full method.​

Answer 1

$x = 3 + 2 \sqrt{2} \\ \frac{1}{x} = \frac{1}{3 + 2 \sqrt{2} } \\ \frac{1}{x} = \frac{1}{3 + 2 \sqrt{2} } \times \frac{3 - 2 \sqrt{2} }{3 - 2 \sqrt{2} } \\ \frac{1}{x} = \frac{3 - 2 \sqrt{2} }{ {3}^{2} + {2 \sqrt{2} }^{2} } \\ \frac{1}{x} = \frac{3 - 2 \sqrt{2} }{9 - 2 \times 2} \\ \frac{1}{x} = \frac{3 - 2 \sqrt{2} }{9 - 4} \\ \frac{1}{x} = \frac{3 - 2 \sqrt{2} }{5}$