(1)2X²-X-3≥0
(2)X(X+2)(X-3)<0
(3)X²+4X+5<0
麻烦写下过程,谢谢!
(1)2X²-X-3≥0
(2)X(X+2)(X-3)<0
(3)X²+4X+5<0
麻烦写下过程,谢谢!
(1)2X²-X-3≥0
(2X-3)(X+1)≥0
X≥3/2 或X≤-1
(2)X(X+2)(X-3)<0
-2≥ X>0且0>X≥3
(3)X²+4X+5<0
(X+2)²+1<0
X无解
1、(2x-3)(x-1)≥0
2x-3≥0 x-1≥0或者2x-3≤0 x-1≤0
x≥2/3或x≤-1
2、画图的x<-2或0<x<3
3、(x+2)²+1<0
(x+2)²<-1没答案
(1)解:2X²-X-3≥0
2X²+2X-3X-3≥0
2X(X+1)-3(X+1)≥0
(2X-3)(X+1)≥0
因此 X≥3/2或者X≤-1