## Practice with complex number arithmetic

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1. Evaluate the following: $=$

2. Evaluate the following: $=$

3. Find $(3)(5 + 6 i)$.

4. Find $(i)(1 -7 i)$.

5. Find $(-9 + 4 i)(3 i)$.

6. Determine the following product: $=$

7. Determine the following product: $=$

8. Evaluate the following:

9. Evaluate the following:

10. Simplify the following division: