Answer
$x=1$ or $x=2$.
Work Step by Step
By factorization, we have
$$x^2 -3 x +2=(x-1)(x-2)=0.$$
Then we have
$$(x-1) =0, \quad \text{or} \quad (x-2)=0$$
That is,
$x=1$ or $x=2$.
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