3x-6/x²+4x+4÷(x-2/x+2)²-1/x-2

问题描述:

3x-6/x²+4x+4÷(x-2/x+2)²-1/x-2

=3(x-2)/(x+2)²×(x+2)²/(x-2)²-1/(x-2)
=3/(x-2)-1/(x-2)
=2/(x-2)