Jawabanmu

2014-07-26T09:29:17+07:00
X1 + x2 = 0
x1 + x2 + x3 = -b/a = -3⇒ x3 = -3
x1x2 + x1x3 + x2+x3 = c/a = -16⇒ x1x2 + x3(x1+x2)=x1x2 + x3.0= -16⇒ x1x2= -16
x1x2x3= -d/a = -k ⇒ -16.(-3)= -k
k = - 48