来自蒋易的问题
计算:(1)x+2yx2−y2+yy2−x2−2xx2−y2;(2)4−(15+2)0+(−2)3÷4−1;(3)x2+2x+1x+2÷x2−1x−1−1x+2;(4)(xx−1−2xx2−1)÷xx−1.
计算:
(1)x+2yx2−y2+yy2−x2−2xx2−y2;
(2)
4−(1
5+2)0+(−2)3÷4−1;
(3)x2+2x+1x+2÷x2−1x−1−1x+2;
(4)(xx−1−2xx2−1)÷xx−1.
1回答
2020-09-09 02:26