[(2xy-3)(2xy+3)+(xy+3)^2]/(-xy)
问题描述:
[(2xy-3)(2xy+3)+(xy+3)^2]/(-xy)
答
=(4X^2Y^2-9+X^2Y^2+6XY+9)/(-XY)
=(5X^2Y^2+6XY)/(-XY)
=-5XY-6