Question

$x ^{2} - 4x + 3 = 0$
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Answer 1

Hola espero que te sirva :D

$x^{2} - 4x + 3 = 0\\\\x^{2} - x - 3x + 3 = 0\\\\x.(x-1)-3(x-1)=0\\\\(x-1).(x-3)=0\\\\\\x-1=0\\\\x-3=0\\\\x=1\\\\x=3\\\\\\\\x_{1} =1,x_{2}=3$