a) 2+3i b) -2+3i c) -2-3i d) -2-3i

2. Adding complex numbers means you add the real parts and add the imaginary parts separately. Try (3+2i) + (4 - 3i)

a) 7 - i b) 1 - i c) 1 - i d) 7 - 5i

3. What is (-5+3i) - (-1-7i) ?

a) -6+10i b) -4+7i c) -6+7i d) -4+10i

4. Z=2+3i so its complex conjugate What is Z.?

13 4+9i 4-9i 9-4i

5. ¦Z¦ means the modulus or distance from the point to the origin. What is ¦3+4i¦?

25 2 5 3

6. If 2-3i is a root of a quadratic equation. What is the other root?

2 2+3i -2+3i None of the above