Answer:
8d

Explanation:
using the rule of radicals
=
×

given
-
+ 2

evaluating each term separately

=
×
×

= 5 × d ×

= 5d

-------------------

=
×

= d ×

= d

-------------------

=
×
×

= 2 × d ×

= 2d

-----------------------
then combining them gives
5d
- d
+ 2(2d
)
= 4d
+ 4d

= 8d
