Question

求解，初二数学求解，急急急

Answer 1

原式=27x^6/(a+b)³·(a-b)(a²+ab+b²)×(a+b)²/(b-a²)² =27x^6/(a+b)³×(a+b)²·(a-b)(a²+ab+b²)×1/(b-a²)² =27x^6/(a+b)·(a-b)(a²+ab+b²)/(b-a²)² =27x^6(a-b)(a&。