(x-3)²+2x(x-3)=0
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![(x-3)²+2x(x-3)=0](/uploads/image/z/2448197-53-7.jpg?t=%EF%BC%88x%EF%BC%8D3%EF%BC%89%26%23178%3B%2B2x%EF%BC%88x-3%EF%BC%89%EF%BC%9D0)
(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