tolong kerjakan pakai cara kerja

2x²+px+(p-1)=0
a=2, b=p, c=p-1
x1,2=(-b)±√b²-4ac/2a
x1,2=(-p)±√p²-4.2.(p-1)/2.2
x1,2=(-p)±√p²-8p+8/4
x1,2=(-p)±√(p-4)²-8/4