Resposta :

DomenicaAdoda
2m^10n^5:²/5m^6n^7:²=m^5n^5:5/5m^3n^7:5=m^n/m^3n^7
ArthurPDC
[tex]\dfrac{2\cdot m^{10}\cdot n^5}{5\cdot m^6\cdot n^7}=\dfrac{2\cdot m^4\cdot m^6\cdot n^5}{5\cdot m^6\cdot n^5\cdot n^2}=\dfrac{2m^4}{5n^2}[/tex]

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