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Complex numbers

Grade 11-12

What this lesson shows

3 plus 2 i. A number with an i in it — imaginary. Scary name… but here's the secret: it's just a POINT.

Try it yourself

Real questions from this lesson's worksheets — answers below each one.

  1. Simplify i²⁹
    Show answer
    i
  2. Add: (1 + i) + (1 + 2i)
    Show answer
    2 + 3i
  3. Add: (1 + i) + (1 + i)
    Show answer
    2 + 2i
  4. Simplify i²¹
    Show answer
    i

Practise this every day

Eduyro gives your child a short daily worksheet on exactly this skill, and moves them on only once they have it. Watch the lesson, then build the fluency.

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