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Arlina · Answer 1 · 2021-12-22T15:25:18+0000

Answer:

see explanation

Explanation:

Given

(20)/(√(2) )

To rationalise the denominator multiply the numerator and denominator by
√(2) , that is

(20(√(2)) )/(√(2)(√(2)) )

=
(20√(2) )/(2)

= 10
√(2)