(2x-1)²=x(3x+2)-7
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(2x-1)²=x(3x+2)-7
(2x-1)²=x(3x+2)-7
(2x-1)²=x(3x+2)-7
x2-6x+8=0
(x-2)(x-4)=0
x=2或4
4x^2-4x+1=3x^2+2x-7
x^2-6x+8=0
(x-2)(x-4)=0
x1=2,x2=4
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