Question

-2i(5+i)

Answer 1

i^2 = -1; so i hope this makes your multiplication easier

Answer 2

huh?

Answer 3

so when u multiply the -2i into 5+i you will get -10i -2i^2
which will give u -10i+2

Answer 4

-10i-2i^
-10i-2(-1)
-10i+2