(-2m/3n)的3次方×(-3n/p)2÷mn/p2
问题描述：
(-2m/3n)的3次方×(-3n/p)2÷mn/p2
答
原题 = -(8m^3/27n^3)*(9np^2/p^2mn)=-(8/27)(m^3/n^3)(9/m)=-(8/3)(m^2/n^3)
答
=-8m³/27n³ ×9n²/p²×p²/mn
=-8m²/3n²