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dua akar negatif
syarat 1
x1+ x2 < 0 -->
-b/a < 0
- (2p)/(p-2) < 0 dgn p ≠ 2
2p /(p-2) > 0
2p(p-2) > 0
p > 2 atau p < 0 ...(1)
syarat 2
x1 x2 > 0
c/a > 0
(p-1)/(p-2) > 0
(p-1)(p-2) > 0 dgn p≠2
p < 1 atau p > 2 ...(2)
D > 0
b²- 4ac >0
(-2p)² - 4(p-1)(p-2) > 0
4p² - 4(p²-3p+2) > 0
4p² - 4p² +12 p - 8 > 0
12p- 8 > 0
12p >8
p < 2/3 .... (3)
Hp p < 0 atau p> 2