题目是不是这样:
(a²-4a+4)分之(2a-6)× (a²-3a)分之(a-2)- (a-2)分之1
=2(a-3)/(a-2)²×(a-2)/[a(a-3)]-1/(a-2)
=2/[a(a-2)]-1/(a-2)
=(2-a)/[a(a-2)]
=-1/a
=-3
题目是不是这样:
(a²-4a+4)分之(2a-6)× (a²-3a)分之(a-2)- (a-2)分之1
=2(a-3)/(a-2)²×(a-2)/[a(a-3)]-1/(a-2)
=2/[a(a-2)]-1/(a-2)
=(2-a)/[a(a-2)]
=-1/a
=-3