问题
填空题
(2x-3y)(-3y-2x)=______
答案
(2x-3y)(-3y-2x),
=(-3y+2x)(-3y-2x),
=(-3y)2-(2x)2,
=9y2-4x2.
故答案为:9y2-4x2.
(2x-3y)(-3y-2x)=______
(2x-3y)(-3y-2x),
=(-3y+2x)(-3y-2x),
=(-3y)2-(2x)2,
=9y2-4x2.
故答案为:9y2-4x2.