(5-d)(d-1)(d+1)
Объяснение:
^ - знак степени
5d^2+d-d^3-5=
=(5d^2-d^3)+(d-5)=
=d^2(5-d)+(d-5)=
=d^2(5-d)-(-d+5)=
=(5-d)(d^2-1)=
=(5-d)(d^2-1^2)=
=(5-d)(d-1)(d+1)
