﹙x²-y²﹚-﹙2x²-3y²﹚等于多少请写过程谢谢急
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/10 21:29:06
![﹙x²-y²﹚-﹙2x²-3y²﹚等于多少请写过程谢谢急](/uploads/image/z/14901764-68-4.jpg?t=%EF%B9%99x%26%23178%3B-y%26%23178%3B%EF%B9%9A-%EF%B9%992x%26%23178%3B-3y%26%23178%3B%EF%B9%9A%E7%AD%89%E4%BA%8E%E5%A4%9A%E5%B0%91%E8%AF%B7%E5%86%99%E8%BF%87%E7%A8%8B%E8%B0%A2%E8%B0%A2%E6%80%A5)
x){sfn%~s.P&lɮKf=0Of|E
YR"}j_`g3ESS
SM=2]n#~qAb6`|2vcu+v%# !g.Pp/
﹙x²-y²﹚-﹙2x²-3y²﹚等于多少请写过程谢谢急
﹙x²-y²﹚-﹙2x²-3y²﹚等于多少请写过程谢谢急
﹙x²-y²﹚-﹙2x²-3y²﹚等于多少请写过程谢谢急
﹙x²-y²﹚-﹙2x²-3y²﹚
=x²-y²-2x²+3y²
=x²-2x²-y²+3y²
=-x²+2y²
﹙x²-y²﹚-﹙2x²-3y²﹚
=x²-y²-2x²+3y²
=x²-2x²+3y²-y²
=-x²+2y²