Complex Numbers Quiz (5 Questions)

1. Solve: x² + 9 = 0

2. True or False: Complex roots appear when b² − 4ac < 0

3. Write the complex conjugate of 3 + 2i

4. Solve: x² + 2x + 5 = 0 using the quadratic formula

5. True or False: Complex roots can appear as a single number

Answer Key

1. x = ±3i

2. True

3. 3 − 2i

4. x = [−2 ± √(4 − 20)] / 2 → x = −1 ± 2i

5. False