(急)计算(x²-y²/xy)²÷(x+y/y)²·(x/x-y)³
问题描述:
(急)计算(x²-y²/xy)²÷(x+y/y)²·(x/x-y)³
如题
答
(x²-y²/xy)²÷(x+y/y)²·(x/x-y)³=[(x+y)²(x-y)²/x²y²]×[y²/(x+y)²]×[x³/(x-y)³]=(x-y)²/x²×x³/(x-y)³=x/(x-y)