Math 112        Test 2    8 pts each  (4 pts free!)    Feb 17, 2005

 


Write in a + bi form (standard form)

1. 

 

2.  (3 - 2i)(3 + 2i)

 

3. 

 

4.  i44

 

Solve for x

5.    x2 - x - 2 = 0

 

6.      x2 -4x = 6

 

7.   (2x - 5)2 = 9

 

8.  x-2 - 2x-1  -  3 = 0


 

9. 

 

10.  Write the equation of the circle with center (-5, 4) and radius 7.

 

11.  Graph the circle whose equation is (x-3)2 + y2 = 9

 

12.  Graph the circle whose equation is

 

x2 + y2 + 20x - 12y - 8    = 0.