Question

化简分式.x－y分之﹙y－x﹚³＝______.x²－9分之9－6x＋x²＝_____.

Answer 1

x－y分之﹙y－x﹚³＝_-(x-y)²_____.

x²－9分之9－6x＋x²＝___（x-3)/(x+3)__.