Question

rationalise the denominators of the following 1 by 3+√2​

Answer 1

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$\tt \longmapsto \: \frac{1}{3 + \sqrt{2} } \\ \\ \tt \longmapsto \: \frac{1(3 - \sqrt{2}) }{(3 + \sqrt{2})(3 - \sqrt{2} ) } \\ \\ \tt \longmapsto \: \frac{3 - \sqrt{2} }{(3) {}^{2} - ( \sqrt{2} ) {}^{2} } \\ \\ \tt \longmapsto \: \frac{3 - \sqrt{2} }{9 - 4} \\ \\ \tt \longmapsto \: \frac{3 - \sqrt{2} }{5}$

Answer 2

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