来自郝云堂的问题
【计算:(1)2xyx2−y2+xx+y−yy−x(2)2aa2−4+12−a(3)(x2x−1-2x1−x)÷xx−1(4)2a+2a−1÷(a+1)-a2−1a2−2a+1.】
计算:
(1)2xyx2−y2+xx+y−yy−x
(2)2aa2−4+12−a
(3)(x2x−1-2x1−x)÷xx−1
(4)2a+2a−1÷(a+1)-a2−1a2−2a+1.
1回答
2020-10-09 23:00