初一 数学 用乘法公式分解因式 请详细解答,谢谢! (21 9:11:13)

4x3y+4x2y2+xy3
= xy(4x2+4xy+y2)
= xy[(2x)2+2*2x*y+y2]
= xy(2x+y)2

4x^3y+4x^2y^2+xy^3
=xy(4x^2+4xy+y^2)
=xy(2x+y)^2

4x3y+4x2y2+xy3
=xy(4x2+4xy+y2)
=xy(2x+y)2

4x3y+4x2y2+xy3=xy(4x^2+4xy+y^2)=xy(2x+y)^2

xy(2x+y)2

x最小次数1 y最小次数1，所以先把xy提出来
=xy(4x^2+4xy+y^2)
之后是完全平方式
=xy(2x+y)^2