来自陈世雄的问题
【[-2(x-y)②]②·(y-x)③PS:②、③是二次方和三次方~】
[-2(x-y)②]②·(y-x)③
PS:②、③是二次方和三次方~
1回答
2020-07-21 17:13
【[-2(x-y)②]②·(y-x)③PS:②、③是二次方和三次方~】
[-2(x-y)②]②·(y-x)③
PS:②、③是二次方和三次方~
[-2(x-y)²]²×(y-x)³=4(x-y)④(y-x)③
=-4(x-y)⑦