有这样一道题:“计算:(x-y)[(x+y)^2-

有这样一道题:“计算:(x-y)[(x+y)^2-xy]+(x+y)[(x-y)^2+xy]的值,其中x=2006,y=

1个回答

(x-y)[(x+y)^2-xy]+(x+y)[(x-y)^2+xy]
=x^3-y^3+x^3+y^3
=2x^3
该数值与y无关,所以抄错了y结果也不受影响