Solve by completing the square to obtain exact solutions.x2 - 4x - 21 = 0
A. -7, 3
B. -i
, i
C. -18, -3
D. 7, -3
Answer: D
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Solve the equation.8x + 5 = 4x - 15
A. 5
B. -20
C. - 
D. -5
Find the equation that the given graph represents.
A. f(x) = x3 - 10x2 - x + 10 B. f(x) = -x4 + x3 - 12x2 + 10 C. f(x) = x4 + x3 - 10x2 + 10 D. f(x) = -x3 - 12x2 + 3x + 10
Determine the domains of f and g.
?
?
A. Domain of f: all real numbers x except x = -4Domain of g: all real numbers x B. Domain of f: all real numbers x except x = ±4Domain of g: all real numbers x C. Domain of f: all real numbers x except x = ±16Domain of g: all real numbers x except x = 4 D. Domain of f: all real numbers x except x = 4Domain of g: all real numbers x E. Domain of f: all real numbers x except x = ±4Domain of g: all real numbers x except x = 4
Find the least common denominator (LCD).
, 
A. (x + 3)2 B. x(x - 3)(x - 6) C. x(x + 3)2 D. x(x + 3)(x - 6)