x^2-4\x+2=19
(x+2)(x-2)/(x+2)=19
1*(x-2)=19
x-2=19
x=19+2
x=21
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x^2-4\x+2=19
(x+2)(x-2)/(x+2)=19
1*(x-2)=19
x-2=19
x=19+2
x=21