What is the sum of the roots of $x^2 - 4x + 3 = 0$?
To find the sum of the roots of a quadratic equation, I can use the formula $-b/a$, where $a$ and $b$ are the coefficients of $x^2$ and $x$ respectively. In this case, $a = 1$ and $b = -4$, so the sum of the roots is $-(-4)/1 = 4$. 