x2 - 4x + 3 = 0
x2 - 3x - x + 3 = 0
x(x - 3) -1 (x -3) =0
(x-3) ( x-1) =0
x =3 or x= 1
Sum of the roots = -b/a = -(-4)/1 =2
3 + 1 =4
Product of the roots = c/a = 3/1 =3
(-3) (-1) = 3
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