Question

The rationalising factor of 1/5root2​

Answer 1

see attached image it's your answer.

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Answer 2

$\frac{1}{5 \sqrt{2} } = \frac{1 \times 5 \sqrt{2} }{5 \sqrt{2} \times 5 \sqrt{2} } = \frac{5 \sqrt{2} }{50} = \frac{ \sqrt{2} }{10}$

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