Question

help me understand this problem and how they solved it

Answer 1

@Nnesha

Answer 2

( 7- 2i) (-3 -8i)
First, use F.O.I.L
-21 - 56i +6i +16i^2
Then, combine like terms and simplify.
Remember that i^2 is equal to -1.
-21 -50i + 16 (-1) =
-21 -50i - 16 =
-37 -50i

Answer 3

use the FOIL method.

First terms multiplied: \((7)(-3)\)

Outer terms multiplied: \((7)(-8i)\)

Inner terms multiplied: \((-3)(-2i)\)

Last terms multiplied: \((-2i)(-8i)\) remember that \(i^2=-1\)

Answer 4

Then just add up everything you've found.