作业帮2大题,1,2小题,,
来源：学生作业帮助网 编辑：作业帮 时间：2024/07/21 04:07:26
x?N0ů C.pd'vMh91Bb =
R^7i:!Z|=>Z}>n~,`ޛHS
1.#'$JY8f&|6~^Ty9+/E]i9y]| !0hP4O!DjSN#Fơ$@BL1ւ#. )$E&QDHIU^]tam&fPjC2.$!bh]=8AaPzQB >Q' =bk]/<^fR L%& AK
2大题,1,2小题,,
2大题,1,2小题,,
2大题,1,2小题,,
① x²+2xy＋y² x²-2xy＋y²
=4+12+9 =4-12+9
=25 =1
② x²+2xy＋y² x²-2xy＋y²
=(x+y)² =(x-y)²
=（-6）² =（2）²
=36 =4