x²×(-xy³)×y²-x³×y³×(-y)²
问题描述:
x²×(-xy³)×y²-x³×y³×(-y)²
答
x²×(-xy³)×y²-x³×y³×(-y)²
= -x^3y^5-x^3y^5
= -2x^3y^5