Complex numbers practice

5. Write the quotient as a complex number. 4-3i/-1-4i

C. 8/17+19/17i

3. Simplify the expression (9+4i)^2

D. 65+72i

4. Simplify the expression (8+i)(2+7i)

D. 9+58i

9. Choose which of the following graphs geometrically represents the sum 2+5i+(3-I)

A. (Graph with points on (0,0) (2,5) and (5,4)

1. Determine which of the following is the rectangle form of a complex number.

A. a+bi

8. Rewrite x^2+9 as A multiplication using complex numbers and the polynomial identity below. u^2+v^2=(u+vi)(u-vi)

B. (x+3i)(x-3i)

6. Find the conjugate of the complex number 8+12i

B. 8-12i

7. Use the complex conjugate to find the absolute value of 8+12i

B. Square root of 208

2. Simplify the expression. (6+6i)-(2+i)

C. 4+5i