(3a的平方b-2ab的平方)*3ab
=9a^3b^2-6a^2b^3
-2(1-3x/2)-4x(2-x/4)
=-2+3x-8x+x^2
=-2-5x+x^2
2x^2(-3xy^2)-x(x^2y^2-2x)
=-6x^3y^2-x^3y^2+2x^2
=-7x^3y^2+2x^2能缩写一下么？顺便帮我把下面两题也做了 求速度= =明天就上学了做了还有一题0.01.(3a的平方b-2ab的平方)*3ab=9a^3b^2-6a^2b^32.-2(1-3x/2)-4x(2-x/4)=-2+3x-8x+x^2=-2-5x+x^23.2x^2(-3xy^2)-x(x^2y^2-2x)=-6x^3y^2-x^3y^2+2x^2=-7x^3y^2+2x^2不是这三题吗