Question

m^3-81/m^2+18m+81 при m=9

Answer 1

$9^{3} - \frac{81}{ 9^{2} } +18*9+81=81*9- \frac{81}{81} +162+81=81*(9- \frac{1}{81} +2+1)$=81*(12-1/81)=81*12-1=972-1=971