# How do you simplify #(5i)(-8i)#?

##### 1 Answer

#### Explanation:

A **Complex Number** is a combination of a **Real Number** and an **Imaginary Number**.

**Standard Form of a Complex Number is :**

**Real Part** and **Imaginary Part**.

In the problem given, the **Real Part** is unavailable.

You have just the **Imaginary Part** for both the complex numbers.

Multiply the complex numbers

Multiply the numerical constants first with the sign:

You need this intermediate result in the final step.

Next, multiply

In complex numbers,

Hence,

In radicals arithmetic,

Hence,

Hope it helps.