Решение во вложении.
(d−8)⋅(d+2)−(d+6)⋅(d−13) =
= d²+2d-8d-16-(d²-13d+6d-78)=
= d²-6d-16-(d²-7d-78)=
=d²-6d-16-d²+7d+78=
= d+62 = -0,15+62=61,85
Решение во вложении.
(d−8)⋅(d+2)−(d+6)⋅(d−13) =
= d²+2d-8d-16-(d²-13d+6d-78)=
= d²-6d-16-(d²-7d-78)=
=d²-6d-16-d²+7d+78=
= d+62 = -0,15+62=61,85