1已知X×X-X-1=0,求-X×X×X-2×X×X+2010的值2已知m×m+n×n-6m+10n+34=0,则m+n的值是多少3Herry 今天和父母去动物园,他们看了许多动物,Herry最喜欢的是大象.假如你是Herry,请用下面的词描述一下今天的经历zoo,see,best,smart,friendly,eat,other,happy

1.原式=-x(xx-x-1)-3(xx-x-1)-4x+2007=2009加减根号5.
2.mm+nn-6m+10n+34=(m-3)^2+(n+5)^2=0,那么 m=3,n=-5,m+n=2
3.Herry went to the zoo with his parents today,they saw many animals and Herry likes elephonts most ,because itis one of the most smart ang friendly animals.Then they found a place with many persons there and they eat together and have a happy time .

1，题意是不是X^2-X-1=0,求-X^3-2X+2010?
2,已知可化为（M-3)^2+(N+5)^2=0,所以M=3,N=-5时才符合条件，即M+N=-2
3,Today my parents and me go to the zoo .We see many animals at zoo,like the birds,the mokeys and others.They are all smart and friendly.I like the elephone most.After eating lunch,we go back home.It's really a happy day.

1、因为X²-X-1=0,所以X³-2X²+2010=X³-X²-X-（X²-X-1）+2009=2009；2、m²+n²-6m+10n+34=0可以配成完全平方形式为（m-3)²+（n+5)²=0,所以m=3,n=-5,m+n=-2;3、Today...

第一题是不是抄错题了，我怎么解不出来。如果换成-XXX+2XX+2010,则结果为2011
第二题mm+nn-6m+10n+34=(m-3)^2+(n+5)^2=0,那么 m=3,n=-5,m+n=2
第三题Today Herry went to the zoo in her town with her partents.They saw many animals.Of all these animals ,Herry liked the elephant best .Because she thout that elephants were smart and friendly.At noon,they ate some food and then visited other animals until the zoo closed .They felt it was a happy day.