几道数学题,解不等式X2-4X-5≤0-2X2+3X-2<0-X2+8X-3>04X2-18X+81/4>01/2X2-3X+5<03X2-2X+1<0X2+2X-3≤0X-X2+6<04X2+4X+1≥0-4+X-X2<03X2-4<02X-X2≥-14-X2≤0(X-A)(X-2)<0

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几道数学题,解不等式X2-4X-5≤0-2X2+3X-2<0-X2+8X-3>04X2-18X+81/4>01/2X2-3X+5<03X2-2X+1<0X2+2X-3≤0X-X2+6<04X2+4X+1≥0-4+X-X2<03X2-4<02X-X2≥-14-X2≤0(X-A)(X-2)<0

几道数学题,解不等式X2-4X-5≤0-2X2+3X-2<0-X2+8X-3>04X2-18X+81/4>01/2X2-3X+5<03X2-2X+1<0X2+2X-3≤0X-X2+6<04X2+4X+1≥0-4+X-X2<03X2-4<02X-X2≥-14-X2≤0(X-A)(X-2)<0
几道数学题,解不等式
X2-4X-5≤0
-2X2+3X-2<0
-X2+8X-3>0
4X2-18X+81/4>0
1/2X2-3X+5<0
3X2-2X+1<0
X2+2X-3≤0
X-X2+6<0
4X2+4X+1≥0
-4+X-X2<0
3X2-4<0
2X-X2≥-1
4-X2≤0
(X-A)(X-2)<0

几道数学题,解不等式X2-4X-5≤0-2X2+3X-2<0-X2+8X-3>04X2-18X+81/4>01/2X2-3X+5<03X2-2X+1<0X2+2X-3≤0X-X2+6<04X2+4X+1≥0-4+X-X2<03X2-4<02X-X2≥-14-X2≤0(X-A)(X-2)<0
X和*(乘号)无法区分,请详细点