Complex numbers practice
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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