计算:(1) (-4x^2-3y^3) (12x^2-9y^3)
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计算:(1) (-4x^2-3y^3) (12x^2-9y^3)
计算:(1) (-4x^2-3y^3) (12x^2-9y^3)
计算:(1) (-4x^2-3y^3) (12x^2-9y^3)
原式=-48x的四次方+39x平方y三方-36x平方y三方+27y九方,中间两项合并一下就好了