Complex Numbers

Lesson 24 Arithmetic with Complex Numbers

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

Open Ended

Multiple Choice

Which expression is equivalent to

$$\sqrt{-4}$$  ?

• -2i

• -4i

• 2i

• 4i