Complex numbers & arithmetic
17 practice questionsEngineering MathematicsStep-by-step solutions
Try a few
1
Multiplying a complex number a + bi by its conjugate a − bi gives:
A.a² − b²
B.a² + b²
C.2ab i
D.a + b
2
What is i^2 for the imaginary unit i?
A.-1
B.0
C.1
D.2
3
Evaluate the product (1 + i)(1 − i).
A.0
B.2
C.2i
D.1 + i²
Master complex numbers & arithmetic — not just preview it
All 17 questions with worked solutions, an AI tutor that explains every step, and games that make the drilling stick. Free to start.
Practice this topic freeNo card needed · 10 free AI questions daily