Find all the complex solutions of the equation.x2 + 1 - 
i = 0
A. 6 - 2i, -6 - 2i
B. 
+ 
i, - 
- 
i
C. 
+ 
i, - 
- 
i
D. 
- 
i, - 
+ 
i
Answer: B
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Solve the problem.One card is selected from a deck of cards. Find the probability of selecting a red card or a card less than 4. (Note: The ace is considered a low card.)
A. 
B. 
C. 
D. 
Solve the problem.A calculator requires a keystroke assembly and a logic circuit. Assume that 88% of the keystroke assemblies and 86% of the logic circuits are satisfactory. Find the probability that a finished calculator will be satisfactory.
A. 0.7396 B. 0.7744 C. 0.8700 D. 0.7568
Find the requested polynomial. Find a polynomial of degree 3 having the following zeros:1 + 
, 1 - 
, and 3
A. f(x) = x3 - 6x2 + 6x - 3 B. f(x) = x3 - 5x2 + 5x + 3 C. f(x) = x3 - 5x2 + 5x - 3 D. f(x) = x3 + 5x2 - 5x + 3
Perform the indicated operations and simplify. Assume that all variables represent positive real numbers.3
+ 9
A. 42
B. 48
C. -48
D. 12