# How do you simplify (4i)(2i)+3?

Aug 30, 2016

$- 5$

#### Explanation:

The first step is to multiply the 2 values.

$\Rightarrow \left(4 i\right) \left(2 i\right) = 8 {i}^{2}$

$\textcolor{\mathmr{and} a n \ge}{\text{Reminder }} \textcolor{red}{| \overline{\underline{\textcolor{w h i t e}{\frac{a}{a}} \textcolor{b l a c k}{{i}^{2} = {\left(\sqrt{- 1}\right)}^{2} = - 1} \textcolor{w h i t e}{\frac{a}{a}} |}}}$

$\Rightarrow \left(4 i\right) \left(2 i\right) + 3 = 8 {i}^{2} + 3 = - 8 + 3 = - 5$