Question

Pleases explain.

Answer 1

Is this in response to your other question? If so, reply there, not here.

Answer 2

Inregards to 2^(5/2) - 2^(3/2) =

Answer 3

Yes, what don't you understand?

Answer 4

2^(5/2) = sqrt 2^5 =2^2sqrt2
2^(3/2) = sqrt 2^3 =2sqrt2
2^2sqrt2 -2sqrt2 =2sqrt2(2-1)=2sqrt2

Answer 5

or the same 4sqrt2 - 2sqrt2 = 2sqrt2