Question

(c-3)×(c-3)×(1/c×c-6×c+9+1/c×c-9)

Answer 1

$(c-3)*(c-3)*(frac{1}c*c-6*c+9+frac{1}c*c-9)=(c-3)^2*(-6c+9-9)=-6c*(c-3)^2=-6c*(c^2-6c+9)=-6c^3+36c^2-54c$