解:设y=2x²-7x+3
∵2>0
∴y=2x²-7x+3的函数图象的开口向上
令2x²-7x+3=0
﹙2x-1﹚﹙x-3﹚=0
解得x=1/2,x=3
∴2x²-7x+3≤0的解集是夹在1/2和3中
∴2x²-7x+3≤0的解集为1/2≤x≤3
(2x-1)(x-3)≤0
1/2≤x≤3
2x²-7x+3≤0
(2x-1)(x-3)≤0
0.5≤x≤3
2x²-7x+3≤0
(2x-1)(x-3)<=0
1/2<=x<=3
2x²-7x+3 ≤0
(x-3)(2 x-1) ≤0
3≥x≥1/2