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#1**+1 **

Here's a graphical solution

Note that we cannot take the log of 0 or a negative value

So x^2 - 4x + 3 must be > 0

Thus....if we graph x^2 -4x +3 here : https://www.desmos.com/calculator/8jbvusmqcq

We can note that the gragh is > 0 on these intervals

(-inf, 1) and (3, infinity)

Note that answer "K" seems to fit the bill....!!!!

CPhill Feb 14, 2019