(x-3)²+2x(x-3)=0

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(x-3)²+2x(x-3)=0(x-3)²+2x(x-3)=0(x-3)²+2x(x-3)=0x=3或1x等于3x=3或1(x-3)²+2x(x-3)=0X=

(x-3)²+2x(x-3)=0
(x-3)²+2x(x-3)=0

(x-3)²+2x(x-3)=0
x=3或1

x等于3

x=3或1

(x-3)²+2x(x-3)=0 X=3

x²-6x+9+2x²-6x=0
3x²-12x+9=0
x²-4x+3=0
(x-3)(x-1)=0
x1=3 x2=1
∴ 此方程解为x1=3 x2=1