EquationSymbolicSolve[Equal[Divide[λ,μ],Product[μ,λ]],μ]Solution[{μ,ExpressionSetPoint[ExpressionWithCondition[1,NotEqual[λ,0]],False,ReservedComplex],1}]Solution[{μ,ExpressionSetPoint[ExpressionWithCondition[-1,NotEqual[λ,0]],False,ReservedComplex],-1}]Solution[{μ,ExpressionSetPoint[ExpressionWithCondition[0,Equal[λ,0]],True,ReservedComplex]}]