(1-x)*(1-2x+x^2+x-x^2+2)=0
(1-x)(3-x)=0
----------------
1-x=0
3-x=0
x=1
x=3
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(1-x)*(1-2x+x^2+x-x^2+2)=0
(1-x)(3-x)=0
----------------
1-x=0
3-x=0
----------------
x=1
x=3