nomor 4 sma pembahasannya ya

a+b = -b/a ab = c/a
= (p+3)/2 = ½
a²+b² = (a+b)² -2ab
3 = (p²+6p+9)/4 - 2(1/2)
(p²+6p+9-4)/4 = 3
p²+6p+5 = 12
p²+6p-7 = 0
(p+7)(p-1) =0
p = -7 dan p= 1 => B