Review — Difficulty 9/10

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

Review skills for this standard. Write answers where shown.

Together with a parent

1. (15 + 2i) + (13 − 5i) = ___ 2. (14i)(−1i) = ___ 3. Plot 14 − 3i on the complex plane. ___

Written review

1. (17 + 2i) + (15 − 5i) = ___ 2. (16i)(−3i) = ___ 3. Plot 16 − 3i on the complex plane. ___ 4. Multiply: (15 + i)(15 − i) = ___ 5. Solve x² + 18 = 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
• [ ] Explains Polar coordinates and complex numbers (intro) without prompts

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