解方程x²-3x+2=0

解方程x²-3x+2=0

x²-3x+2=0
(x-1)(x-2)=0
x1=1,x2=2
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x²-3x+2=0
(x-1)(x-2)=0
解得：x=1或2

x²-3x+2=0
(x-1)(x-2)=0
x1=1，x2=2