mohon bantuannya......

x1 + x2 = -5
x1.x2 = -6
Akar persamaan kuadrat baru
x1 - 2 + x2 - 2 = x1 + x2 - 4
= -5 - 4
= -9
(x1 - 2)(x2 - 2) = x1.x2 -2(x1 - x2) + 4
= -6 -2(-5) + 4
= 8
Jadi didapat x^2 + 9x + 8 = 0