(-y的2次幂)的3次方除以y的3次幂乘以(-y)等于多少 急

问题描述:

(-y的2次幂)的3次方除以y的3次幂乘以(-y)等于多少 急

﹙﹣y²﹚³÷y³×﹙﹣y﹚
=﹙﹣y²﹚^4÷y³
=y^8÷y³
=y^5.﹙﹣y﹚和﹙﹣y²﹚怎么可以并合在一起对不起!看错了。 ﹙﹣y²﹚³÷y³×﹙﹣y﹚=﹣y^6·﹙﹣y﹚÷y³=y^7÷y³=y^4.