Question

Ratinalise the dinominator of 1 by 3+ under root 2

Answer 1

$\frac{1}{3+\sqrt{2} } . \frac{3-\sqrt{2} }{3-\sqrt{2} } = \frac{3-\sqrt{2} }{9-2}= \frac{3-\sqrt{2} }{7}$

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