For P(x)=x3−6x2+11x−6P(x) = x^3 - 6x^2 + 11x - 6P(x)=x3−6x2+11x−6 with roots r1,r2,r3r_1, r_2, r_3r1,r2,r3, find r1r2+r1r3+r2r3r_1 r_2 + r_1 r_3 + r_2 r_3r1r2+r1r3+r2r3.
11
6
-6
-11