Question

show that 2 root 5 equals root 20 with explanation of the process plzz

Answer 1

2√5=√4×√5. (as √4=2)

So,we can write √2×5 as √4×√5

2√5=√4×5

2√5=√20

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Answer 2

We have,

$\textbf{2√5 = √5 x 2 x 2 =√20}$

Explanation,

Here we had just taken the number outside the root, inside and doubled it.

That is we doubled here 2 which is outside the (√) and multiplied with the number which was already under that was (√5).