Question

化简（x平方-4x+4分之x平方-4)+(x+2分之2-X)

Answer 1

=(x+2)(x-2)/(x-2)²-(x-2)/(x+2)

=(x+2)/(x-2) -(x-2)/(x+2)

=[(x+2)²-(x-2)²]/(x+2)(x-2)

=8x/(x²-4)