Question

1 2.3.

Answer 1

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Answer 2

2√128 -√72 =2*√(2*64) - √(2*36)=2*8√2- 6√2=16√2-6√2= 10√2

(3√2+√50)*√2 = (3√2+√(2*25))*√2= (3√2+5√2)*√2=8√2 *√2=16

(6 - √3)*√2= 6√2- √6

Answer 3

It seems like you have provided the numbers "1" and "2.3" in your input. Is there anything specific you would like to know or discuss about these numbers? Please provide more context or ask a question so that I can assist you further.