complex numbers part 1

Simplify.

• -5i
• 5
• 5i
• -5

√(-300)

• 10i√3
• 15√15
• -10√3
• 2i√13

Another way to express √-1 is?

• 1

• -1

• i

• 0

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

What does i² = ?

• -1
• √-1
• 1
• -√1

What is the imaginary part of 21-14i?

• 14

• 21

• -21

• -14

What is the real part of 13.2i+1?

• 13.2

• -1

• 1

• -13.2

 $\ Simplify\ :\sqrt{-36}\ +\ \sqrt{16}$  

•  $4\ -\ 6i$  

•  $4\ +\ 6i$  

•  $\sqrt{6}i\ -\ 4$  

•  $-\sqrt{6i}\ +\ 4i$  

Solve for x: 

• x = {-4, -1}
• x = {-1, -4}
• x = {2+i, 2-i}
• x = {-2+i, -2-i}

Simplify:

√-27

• i√27

• 3√-3

• -3√3

• 3i√3