Review — Difficulty 4/10

Trigonometry · Honors · Polar coordinates and complex numbers (intro)

Review skills for this standard. Write answers where shown.

Together with a parent

1. (10 + 2i) + (8 − 5i) = ___ 2. (9i)(−2i) = ___ 3. Plot 9 − 4i on the complex plane. ___

Written review

1. (12 + 2i) + (10 − 5i) = ___ 2. (11i)(−1i) = ___ 3. Plot 11 − 4i on the complex plane. ___ 4. Multiply: (10 + i)(10 − i) = ___ 5. Solve x² + 13 = 0 in ℂ: x = ___ 6. Real part ___ , imaginary part ___

_See printable PDF for diagram._

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Skills checklist

• [ ] Adds, subtracts, and multiplies complex numbers
• [ ] Uses i² = −1 correctly
• [ ] Plots complex numbers in the plane

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