计算:(x+2y-3/2)(x-2y+3/2)
问题描述:
计算:(x+2y-
)(x-2y+3 2
) 3 2
答
(x+2y-
)(x-2y+3 2
)3 2
=x2-(2y-
)23 2
=x2-4y2+6y-
.9 4