127+(5c-3)(25c^2+15c+9)при c=-1(1/5)

Question

127+(5c-3)(25c^2+15c+9)при c=-1(1/5)

Answer 1

127+(5c-3)(25c^2+15c+9);
127+(125c^3+75c^2+45c-75c^2-45c-27);
127+125c^3-27;
125c^3+100=>125*(-1(1/5))^3+100=>-216-100=-116