问题
解答题
化简求值
|
答案
原式=
×(x2+y2)x+y (x2+y2)(x+y)(x-y)
=
×(x2+y2)1 (x2+y2)(x-y)
=
,1 x-y
当x=8,y=11时,原式=
=-1 8-11
.1 3
化简求值
|
原式=
×(x2+y2)x+y (x2+y2)(x+y)(x-y)
=
×(x2+y2)1 (x2+y2)(x-y)
=
,1 x-y
当x=8,y=11时,原式=
=-1 8-11
.1 3