1/5x的平方y乘以(-5xy)平方-(-2x)立方乘以xy立方
问题描述：
1/5x的平方y乘以(-5xy)平方-(-2x)立方乘以xy立方
答
Y的平方减8x的6次方y三次方
答
原式=1/5x²y×(-5xy)²-(-2x)³×xy³=1/5x²y×(-5)²×x²×y²-(-2)³×x³×xy³=1/5x²y×25x²y²-(-8)×x³×xy³=(25×1/5)×(x²×...