a=0时,解得b=0,此时a/b -b/a无意义.a,b≠0时,等式两边同除以b²(a/b)²+(a/b)-2=0(a/b +2)(a/b -1)=0a/b=-2或a/b=1a=-2b或a=ba=-2b时,a/b -b/a=(a²-b²)/(ab)=[(-2b)²-b²]/[(-2b)b]=-3/2...