查人人中国名人网pads9.0绿色版.rar:求助分解因式
来源：百度文库 编辑：查人人中国名人网 时间：2024/05/05 21:48:44
4(X+y)平方-(x-y)平方
2x平方-11xy+5y平方
2x平方-11xy+5y平方
4(x+y)^2-(x-y)^2
=[2(x+y)+(x-y)][2(x+y)-(x-y)]
=(3x+y)(x+3y)
2x^2-11xy+5y^2
=2x^2-xy-10xy+5y^2
=(2x-y)(x-5y)
4(x+y)^2-(x-y)^2=(2(x+y)+(x-y)) * (2(x+y)-(x-y))=(3x+y)*(3y+x)
2x^2-11xy+5y^2=(2x-y)*(x-5y)