因为(x+2)^2≥0
所以①当(x-2)*(x+1)*(x+2)^2=0时
x=2,-1,-2
②当(x-2)<0,(x+1)>0,(x+2)^2≠0时原不等式也成立
得x<2,x>-1,x不等于-2
所以-1<x<2
③当(x-2)>0,(x+1)<0,(x+2)^2≠0时原不等式也成立
得x>2,x<-1,x≠-2
为空集
所以此不等式的解为-1≤x≤2或x=-2
(x-2)*(x+1)*(x+2)^2<=0
(x+2)^2>=0
==> (x-2)*(x+1)<=0
==> (x+1)<=0 (x-2)>=0 or (x+1)>=0 (x-2)<=0
==> -1 <= x <= 2
==> -1 <= x <= 2 or x = -2
因为a^2>=0,所以原式=0得
x=2or-1or-2
∵(x+2)^2≥0
故只需要:(x-2)*(x+1)≤0
故原不等式的解集为:-1≤x≤2
(-无穷,-2)U(-1,2)