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syarat 2 akar pers kuadrat real berbeda :
D > 0
(-2(p-1))² - 4(p)(p) > 0
4p² - 8p + 4 - 4p² > 0
-8p + 4 > 0
-8p > -4
p < -4/-8
p < 1/2
Jadi persamaan kuadrat tersebut mempunyai dua akar real berbeda apabila nilai