Respostas

2013-11-27T14:28:54-02:00
A)6m6m^{4}.(4m^{3}n-3m)=24m^{7}-18m^{4}n^{3}
 6m^{4}.4m^{3}n-3m=
\\6m^{4}.4m^{3}n=24m^{7}n
\\6m^{4}.(-3n)=-18m^{4}n^{3}

B:(21x^{5}zy^{2}+14Xyz)
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