(3a-2b)(a-b)=0a=2b/3 或a=b即：b/a=3/2 或b/a=1当b/a=3/2 时a/b-b/a-(a²+b²)/ab=2a/b - 2b/a= 4/3 - 3=-2/3当b/a=1时a/b-b/a-(a²+b²)/ab=2a/b - 2b/a=0