(2×y+x²-y²)-(x²-y²-3xy) 计算题,

来源：学生作业帮助网编辑：六六作业网时间：2025/02/02 10:46:19

(2×y+x²-y²)-(x²-y²-3xy)计算题,(2×y+x²-y²)-(x²-y²-3xy)计算题,(2×y+x

(2×y+x²-y²)-(x²-y²-3xy) 计算题,
(2×y+x²-y²)-(x²-y²-3xy) 计算题,

原式=2xy+x2-y2-x2+y2+3xy
=5xy