Solve the quadratic equation and write the solutions in terms of i.x2 - 12x + 40 = 0
A. x = 4, x = 8
B. x = 6 ± 4i
C. x = 6 ± 2i
D. x = 6 + 2i
Answer: C
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Find the indicated term for the geometric sequence.a1 = 122,880, r = 
; a6
A. 480
B. 
C. 120
D. 30
Solve the problem.A family is driving from Algebraville to Geometry City to Trig Town. With reference to the origin, Algebraville is located at 
, Geometry City at 
, and Trig Town at 
, all numbers being in 1000-mile units. Find the distance from Algebraville directly to Trig Town. If necessary, round your answer to the nearest whole number.
A. 9220 mi B. 16,553 mi C. 15,000 mi D. 15 mi
Use Cramer's rule to solve the linear system.
A. x = 7, y = -5, z = -9 B. x = 7, y = 5, z = 9 C. x = 8, y = 3, z = 9 D. x = 5, y = 9, z = 5
Solve the equation in the real number system.x4 - 21x2 - 100 = 0
A. {-5, -2, 2, 5} B. {-10, 10} C. {-5, 5} D. {-2, 2}