Jawabanmu

2014-05-27T19:19:10+07:00
X² - 2px + 9 = 0  syarat akar kembar D = 0
b² - 4ac = 0
(-2p)² - 4(1)(9) = 0
4p² - 36 = 0
p² - 9 = 0
(p+3)(p-3) = 0
jadi nilai p = -3 atau p = 3