Complex Numbers. Quadratic Formula--Quiz

In Problems 1-3 perform the calculations; that is, represent each given expression in the form a+bi.

Problem 1.     (2 - i)(3 + 2i) =

(A)     4 - i     (B)    8 + 7i     (C)    8 + i     (D)    4 + i

Problem 2. =

(A) (B) (C) (D)

Problem 3.     (2 - i) - (3 - 2i) =

(A)    -2 - 3i     (B)     -1 + i     (C)    -3 +2i     (D)    -2 + i

Problem 4. Solve

.

(A)     -1, 1     (B)     (1 + i) , (1 - i)    (C)    i, -i     (D)    ,

MTH 111 Quizzes, B. Kaskosz and L. Pakula, 2001.