X大于0小于1化简(X+X分之1)平方—4=

Question

要过程

Answer 1

0<x<1
(x+1/x)²-4
x²+2+1/x²-4
=x²-2+1/x²
=(x-1/x)²

Answer 2

(x+1/x)²-4

=x²+2+1/x²-4

=x²-2+1/x²

=(x-1/x)²