Adding and subtracting complex numbers do now

Language: English
Subject: Math > Algebra
Age: 17 - 18

Adding and subtracting complex numbers do now

What is a complex number?

Simplify (−4i) − (5i)

Simplify (5 + 6i) + (2 − 7i)

Simplify (3 − 4i) − (−5 + 7i)

Simplify (−1 + 6i) + (5 − 2i) − (8i)