Solve the equation by completing the square.a2 - 4a - 21 = 0
A. 
, - 
B. -18, -3
C. 7, -3
D. -7, 3
Answer: C
Mathematics
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Determine all critical points for the function.f(x) = (x - 6)3
A. x = 6 B. x = 6 and x = 3 C. x = 0, x = 6, and x = 3 D. x = 0 and x = 6
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Determine the sum or difference in clock 12 arithmetic.(2 + 1) + (1 + 8)
A. 1 B. 4 C. 2 D. 12
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Find an antiderivative of the given function.f(x) = 
x5/7
A. 
x12/5
B. 
x12/7
C. 
x12/5
D. 
x12/7
Mathematics
Match the correct function to the graph.
A. y = x - 2 B. y = |x + 2| C. y = |1 - x| D. y = |2 - x|
Mathematics