Question

1/5+root2 by rationalising the denominator
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Answer 1

Answer:

$\frac{1}{5 + \sqrt{2} } = \frac{5 - \sqrt{2} }{23}$

Step-by-step explanation:

$\frac{1}{5 + \sqrt{2} } = \frac{1}{5 + \sqrt{2} } \times \frac{5 - \sqrt{2} }{5 - \sqrt{2} } \\ = \frac{5 - \sqrt{2} }{25 - 2} \\ = \frac{5 - \sqrt{2} }{23}$

Answer 2

Step-by-step explanation:

$5 - \sqrt{3} \div 23$