Analytically show that the two forms of the equation are equivalent

Problem: Clapeyron's ideal gas law, as the name suggests, holds for ideal gases only, where there is essentially no interaction between atoms and molecules. The Redlich-Kwong equation comprises a sometimes more accurate relationship for real gases. It is commonly written in one of two equivalent forms (and it must be said that notation is not consistent across various accounts). We have either: RTPv=vbvRT23(v+b)a where: a=9(321)PcR2Tc25,b=3Pc(321)RTc or equivalently RTPv=Z,Z3Z2+(ABB2)ZAB=0 where: A=R2T25aP,B=RTbP