Question

Select the correct answer from each drop-down menu.

If x = (10 - 3i) and y= (3 - 10i), then xy=
and r/y

Answer 1

`xy=30-109i+30i^2`

Explanation:

If x=(10-3i) and y=(3-10i), then xy=

`(10-3i)(3-10i)=`

Using the FOIL method:

First:
`30`

Outer:
`-100i`

Inner:
`-9i`

Last:
`30i^2`

`30-100i-9i+30i^2=\\30-109i+30i^2`

`xy=30-109i+30i^2`