网络推广员有用吗:因式分解 急!!!!!!

来源:百度文库 编辑:中科新闻网 时间:2024/04/29 04:54:21
x^2y^2+xy-x^2-y^2+x+y+2
拜托,详细过程

=(xy+1)^2-x^2-y^2-xy+x+y+1
=(xy+1)^2-(x+y)^2+XY+X+Y+1
=(XY+1-X-Y)(xy+1+x+y)+xy+x+y+1
=(xy-x-y+2)(xy+x+y+1)

x^2 y^2 + xy - x^2 - y^2 + x + y + 2
=(xy + 1)^2 - x^2 - y^2 - xy + x + y + 1
=(xy + 1)^2 - (x + y)^2 + xy + x + y + 1
=(xy + 1 - x - y)(xy + 1 + x + y) + xy + x + y + 1
=(xy - x - y + 2)(xy + x + y + 1)