Jawabanmu

2014-02-14T20:33:21+07:00
Misal akar-akarnya p dan q
p + q = -b/a = 7
-p -q = -b'/a'
-(p+q) = -b'/a'
7 = b'/a'
pq = c/a = 13
(-p)(-q) = c'/a'
13 = c'/a'
persamaan kuadrat yg baru x^2 + 7x + 13 = 0

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