Performing Operations with Complex Numbers Answers

What is the sum of 15 – 6i and –2 + 9i?

What is the value of ?

Which equation is an example of the commutative property of multiplication?

Which property of addition is shown below? 3 + 4i + 5 + 6i = 3 + 5 + 4i + 6i

Which equation shows an example of the associative property of addition?

What is the multiplicative identity of the complex number –4 + 8i?

Helene is finding the sum (9 + 10i) + (–8 + 11i). She rewrites the sum as (–8 + 11)i + (9 + 10)i. Which statement explains the property of addition that she made an error in using?

Which property of addition is shown in the equation below? c + di + 0 + 0i = c + di

Which expression is equivalent to ?

Which equation illustrates the identity property of multiplication?