bagaimana cara kerjanya?

x^2 +px -(p+1) = 0
a = 1,b = p, c= -(p+1) = -p-1
@^2 +B^2 = 50
maka p yg memenuhi adalah

@+B = -b/a = -p/1 = -p
@ x B = c/a = -p-1/1 = -p-1

@^2 + B^2 = 50
(@+B)^2 - 2@B =50
(-p)^2 - 2(-p-1) = 50
p^2 +2p +2 -50 = 0
p^2 + 2p - 48 = 0
(p +8)(p-6)
p = -8 atau p = 6