推荐回答（4个）
2x²-7x+3=0
x²-7/2x=-3/2
(x-7/4)²=-3/2+49/16
(x-7/4)²=25/16
x-7/4=±5/4
x=7/4±5/4
x=3或1/2
2x²-7x+3=0
2x²-7x=-3
x²-7/2x=-3/2
x²-7/2x+49/16=25/16
（x-7/4）²=25/16
x-7/4=±5/4
x=3或1/2
2x2-7x+3=0
1 -1
2 -3
(x-1)(2x-3)=0
x1=1,x2=3/2
2x²-7x+3=0
(x-3)(x-2)=0
x1=3 x2=2
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