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 ，Herry went to the zoowith her partents.They saw many animals.Of all these animals ,Herry liked the elephant best .Because she thought that elephant...
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=23.Herry went to the zoo with his parents today,they saw many animals and Herry ...
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=-23,Today my parents and me go to the zoo .We see many animals at zoo,like the birds,the mokeys an...
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 an...
