# How do you simplify #(8i)(-4i)#?

##### 2 Answers

Mar 17, 2018

#### Explanation:

When performing the basic mathematical functions on terms that contain

We can begin to treat this as a normal multiplication problem:

Now that we have this, we need to understand how setting

(Click here for more information regarding imaginary numbers)

In this instance, however, the

Knowing this we can write our expression as:

Mar 17, 2018

#### Explanation:

#color(orange)"Reminder "color(white)(x)i^2=(sqrt(-1))^2=-1#

#rArr(8i)(-4i)#

#=-32i^2=-32xx-1=32#