(1) 2x²(x2+2x-3)(2)-3x(5-2x+x²)(3)(3x²+2y²)×2xy
问题描述:
(1) 2x²(x2+2x-3)
(2)-3x(5-2x+x²)
(3)(3x²+2y²)×2xy
答
1) 2x²(x2+2x-3)=8x立方-6x平方
(2)-3x(5-2x+x²)=-15x+6x平方-3x立方
(3)(3x²+2y²)×2xy=6x立方y+4xy立方