=(x+y)²-4(x+y)+4
=(x+y-2)²
猜你喜欢
- 142.56平方分米=( )平方分米=( )平方厘米
- 2一些唯美的语言用英语怎么说
- 3he is very---(excite)about going to paris
- 4已知函数f(x)=log2 x-3(x属于【1,8】),求函数【f(x)】平方+2f(x)的最值
- 5已知:a+b+c=0,且abc不等于0,求|a|除以a+|b|除以b+|c|除以c+abc除以|abc|的值
- 6he is not such a clever boy as his brother同义句是什么呀
- 7Please tidy up your room and ____ everything awawy. A get B put C take D give
- 8已知数列{an}的前n项和Sn=n2+n,数列{bn}满足bn+1=2bn-1(n∈N*),且b1=5. (Ⅰ)求{an},{bn}的通项公式; (Ⅱ)设数列{cn}的前n项和为Tn,且cn=1/an•log2(bn-1),证明:Tn<1/
- 9There are some signs here (否定句)
- 10有一排路灯,原来每相邻两盏灯之间相距8米,现在要改成每相邻两盏灯之间相距12米.如果有一盏灯不动,那么至少再隔多少米可以有一盏灯不移动?