①4(x+y)²-9(x-y)²②(x²+1)²-20(x²+1)+100③x²+5x-6④(a²+a)-10(a²+a)-24⑤xy-x-y+1⑥a²-b²-2a+1
来源:学生作业帮助网 编辑:作业帮 时间:2024/11/26 20:36:32
xRJ@Af^IZGE *LvRBe@Bm
6./!Mۿp̴Rn={rǯеu
A,. U]4cx6oH uMTcI2٤5PrSJ$E#d"eSB0\0s_oMIJd$!R5y,K?5xd/$DcvX?D_J6.l9:a8a
N|>~lGP{ݷgꎻWݪhs!<>xWAij#q8^~3/^RfZKpD