(1/2x+y)(1/2x-y)(1/4x2-y2).
问题描述:
(
x+y)(1 2
x-y)(1 2
x2-y2). 1 4
答
原式=(
x2-y2)(1 4
x2-y2)1 4
=
x4-1 16
x2y2+y4.1 2