Question 95
Numbers $x_1$, $x_2$, $x_3$ ($x_1 \lt x_2 \lt x_3$) are the roots of the equation
$$
x^3 - 3x^2 + (a+2)x - a = 0,
$$
where $a$ is a real number.
Find all possible values of the expression $4x_1 - x_1^2 + x_3^2$.
$$
x^3 - 3x^2 + (a+2)x - a = 0,
$$
where $a$ is a real number.
Find all possible values of the expression $4x_1 - x_1^2 + x_3^2$.