The function $f(x) = x^2 - 4x + 3$ has roots $x_1$ and $x_2$. What is the value of $x_1 + x_2$? (A) $-4$ (B) $-3$ (C) $3$ (D) $4$ (E) $7$
The function $f(x) = x^2 - 4x + 3$ has roots $x_1$ and $x_2$. What is the value of $x_1 + x_2$?
\noindent(A) $-4$\\
(B) $-3$\\
(C) $3$\\
(D) $4$\\
(E) $7$