Operations with Complex Numbers Answers

6 verified answers

What is the additive inverse of –2 + 8i?

2 + 8i

–2 – 8i

2 – 8i

–2 + 8i

(4 + 5i)(4 – 5i) =

Answer:

The product of a complex number and its complex conjugate is a real number.

always

sometimes

never

Which of the following is equivalent to –2i(6 – 7i)?

(0 – 2i)(6 – 7i)

(0 + 2i)(6 – 7i)

(–2 + i)(6 – 7i)

(6 – 2i) – (7i – 2i)

Multiply (2 – 7i)(–1 + 4i).

26 + 15i

–2 – 28i

26 + i

–30 + 15i

Find the product of each pair of complex conjugates.(3 + 8i)(3 – 8i) =

Answer:

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