Jawabanmu

2014-06-05T13:55:13+07:00
A + b = 3
ab = 2
PK:
x1 + x2 = a - 5 + b - 5 = a+b - 10 = 3 - 10 = -7
x1 . x2 = (a - 5)(b - 5) = ab - 5(a + b) + 25 = 2 - 15 + 25 = 12
PK baru
x² + 7x + 12 = 0
1 5 1