x方-4x+3=0

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x方-4x+3=0x方-4x+3=0x方-4x+3=0x²-4x+2=-3x-2=±1∴x-2=1或x-2=-1∴x1=1,x2=31或3x方-4x+3=0x方-4x+4=1(x-2)

x方-4x+3=0
x方-4x+3=0

x方-4x+3=0
x²-4x+2= - 3
x-2= ±1
∴x-2=1或x-2= - 1
∴x1=1,x2=3

1或3

x方-4x+3=0
x方-4x+4=1
(x-2)²=1
x-2=1 x=3
x-2=-1 x=1

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