Complex Numbers

Lesson 24 Arithmetic with Complex Numbers

Fill in the Blank

Write each expression in the form a+bi, where a and b are real numbers. For i, type lowercase i without italics.

$$2\sqrt{-4}$$  

Fill in the Blank

Write each expression in the form a+bi, where a and b are real numbers. For i, type lowercase i without italics.

$$3i\cdot2i$$  

Fill in the Blank

Write each expression in the form a+bi, where a and b are real numbers. For i, type lowercase i without italics.

$$i^4$$  

Fill in the Blank

Write each expression in the form a+bi, where a and b are real numbers. For i, type lowercase i without italics.

$$4-3\sqrt{-1}$$  

Multiple Choice

What are a and b when you write the expression below in the form a+bi, where a and b are real numbers?

$$\sqrt{-16}$$  

• a=0, b=-4

• a=0, b=4

• a=-4, b=0

• a=4, b=0

Multiple Choice

Which expression is equivalent to (3+9i)−(5−3i)?

• -2−12i

• -2+12i

• 15+27i

• 15−27i

Fill in the Blank

Write the expression in form a+bi :

(30−3i)−(15+30i)

Open Ended

Multiple Choice

Which expression is equivalent to

$$\sqrt{-4}$$  ?

• -2i

• -4i

• 2i

• 4i