用配方的方法解：6x²-x-2=02x²-12x=93x²-6x-5=02x²+3x=2

用配方的方法解：6x²-x-2=02x²-12x=93x²-6x-5=02x²+3x=2
用配方的方法解：6x²-x-2=0
2x²-12x=9
3x²-6x-5=0
2x²+3x=2

用配方的方法解：6x²-x-2=02x²-12x=93x²-6x-5=02x²+3x=2
6x²-x-2=6(x²-x/6+1/144)=2+1/24=49/24
(x-1/12)²=49/144
x1=1/12-7/12=-1/2,x2=1/12+7/12=2/3
2x²-12x+18=27
x²-6x+9=27/2
(x-3)²=27/2
x1=3-(3/2)√6,x2=3+(3/2)√6
3x²-6x-5=0
3(x²-2x+1)=8
(x-1)²=8/3=24/9
x1=1-(2/3)√6,x2=1+(2/3)√6
x²+3x/2=1
x²+3x/2+9/16=25/16
(x+3/4)²=25/16
x1=-3/4-5/4=-2,x2=-3/4+5/4=1/2