计算:(x+2y-3/2)(x-2y+3/2)

问题描述:

计算:(x+2y-

3
2
)(x-2y+
3
2

(x+2y-

3
2
)(x-2y+
3
2

=x2-(2y-
3
2
2
=x2-4y2+6y-
9
4