(1) 2x²(x2+2x-3)(2)-3x(5-2x+x²)(3)(3x²+2y²)×2xy

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(1) 2x²(x2+2x-3)(2)-3x(5-2x+x²)(3)(3x²+2y²)×2xy

(1) 2x²(x2+2x-3)(2)-3x(5-2x+x²)(3)(3x²+2y²)×2xy
(1) 2x²(x2+2x-3)
(2)-3x(5-2x+x²)
(3)(3x²+2y²)×2xy

(1) 2x²(x2+2x-3)(2)-3x(5-2x+x²)(3)(3x²+2y²)×2xy
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