分解因式4xy^2-4x^2y-y*y*y
问题描述:
分解因式4xy^2-4x^2y-y*y*y
答
4xy^2-4x^2y-y*y*y
=4xy^2-4x^2y-y^3
=y(4xy-4x^2-y^2)
=-y(4x^2-4xy+y^2)
=-y(2x-y)^2