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[2m(7n^3m^3)^2+28m^7n^3-21m^5n^3]/(-7m^5n^3)等于多少,结果不带括号,x的降幂排列.
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[2m(7n^3m^3)^2+28m^7n^3-21m^5n^3]/(-7m^5n^3)等于多少,结果不带括号,x的降幂排列.
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答案和解析
[2m(7n^3m^3)^2+28m^7n^3-21m^5n^3]/(-7m^5n^3)
=（14m^6n^6+28m^7n^3-21m^5n^3）/(-7m^5n^3)
=-2mn^3-4m^2+3
=3-4m^2-2mn^3
=（14m^6n^6+28m^7n^3-21m^5n^3）/(-7m^5n^3)
=-2mn^3-4m^2+3
=3-4m^2-2mn^3
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