Question

Упростите выражение:
4c(−3c−7)(9c+5)

Answer 1

4c(-27c^2-35-63c-15c)= - 108c^3 - 140c- 252c^2 - 60c^2= - 108^3-312c^2-140c

Answer 2

$displaystyle tt 4c(-3c-7)(9c+5)=(-12c^2-28c)(9c+5)=\\ displaystyle tt =-108c^3-60c^2-252c^2-140c=bold{-108c^3-312c^2-140c}$