Multiplying Complex Numbers (Topics)

What is the standard form for a complex number?

• -8i
• a + bi
• bi + a
• -8i + 8

A complex number can be expressed as a + bi. What does a represent?

• the real part of the complex number

• the imaginary part of the complex number

• depends on the sign of the number

• the square root of the complex number

Another way to express  $i^2$  is?

• 1

• -1

•  $i$  

•  $-i$  

Another way to express  $\sqrt{-1}$ is? 

• 1

• -1

•  $i$  

• 0

Another way to express  $i^1$  is?

• 1

• -1

•  $i$  

•  $-i$  

Another way to express  $i^3$  is?

• 1

• -1

•  $i$  

•  $-i$  

 $Simplify:\ \left(i\right)\left(3i\right)$  

• -3i

• -3

• 3

• 2i

(-3-i)(6-i)

• -21-7i
• -19-3i
• -15-5i
• -17-9i

(5-i)(5-i)

• 15-8i
• 36
• 24+10i
• 24-10i

(7-5i)(7+5i)

• 74
• 75
• 74-1