-1 x^2+2x-1﹥-1 x^2+2x>0 x>0或x<-2 x^2+2x-1≤2 x^2+2x-3≤0 (x+3)(x-1)≤0 -3≤x≤1 所以解集如图 -3≤x<-2 0﹤x≤1
x^2+2x-1﹥-1 x^2+2x>0 x>0或x<-2
x^2+2x-1≤2 x^2+2x-3≤0 (x+3)(x-1)≤0 -3≤x≤1
所以解集如图
-3≤x<-2
0﹤x≤1
-1x²+2x>0x(x+2)>0x>0 or x<-2x²+2x-1<=2x²+2x-3<=0(x+3)(x-1)<=0-3<=x<=1综合:-3≤x<-2 和 0
-111<(x+1)^2≤410