(2/3x-3/2y)^2=4/9x^2+( )-( )y^2
问题描述:
(2/3x-3/2y)^2=4/9x^2+( )-( )y^2
答
-2xy
-9/4
(2/3x-3/2y)^2=4/9x^2+( )-( )y^2
-2xy
-9/4