x^2y-2x^2y^3-3x^3y等于多少?因式分解
问题描述:
x^2y-2x^2y^3-3x^3y等于多少?因式分解
答
x²y-2x²y^3-3x^3y
=x²y(1-2y²-3x)
=-x²y(2y²+3x-1)