1.∵x²-x=x(x-1)∴1/x和x/(x²-x)的最简公分母是：x²-x2.a²+ab = a(a+b)a²-b²=(a+b)(a-b)∴分式a/a-b、b/a²+ab、1/a²-b²的最简公分母是：a(a+b)(a-b)...分式a/a-b、b/a²+ab、1/a²-b²的最简公分母是_______.